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CERTFR-2026-AVI-1138
Vulnerability from certfr_avis
Une vulnérabilité a été découverte dans les produits Cisco. Elle permet à un attaquant de provoquer un contournement de la politique de sécurité.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Cisco | UCS | UCS Server Software versions 6.0 antérieures à 6.0(2.260143)1 | ||
| Cisco | UCS | UCS Server Software versions 1.2 and earlier antérieures à Release no. TBD (Sep 2026) | ||
| Cisco | UCS | UCS Server Software versions 6.0 antérieures à 6.0(2d)1 | ||
| Cisco | Intersight Server | Intersight Server Firmware versions antérieures à 5.4(0.260050)1 | ||
| Cisco | Intersight Server | Intersight Server Firmware versions antérieures à 5.4(0.260042) | ||
| Cisco | UCS | UCS Server Software versions 2.0 antérieures à Release no. TBD (Oct 2026) | ||
| Cisco | UCS | UCS Server Software versions antérieures à 4.3(6h)1 | ||
| Cisco | UCS | UCS Server Software versions 4.0 antérieures à 4.0(2.260004) | ||
| Cisco | UCS | UCSE BIOS versions antérieures à 4.041 (Sep 2026) | ||
| Cisco | NFVIS | NFVIS versions antérieures à 4.15.7 (Oct 2026) | ||
| Cisco | UCS | UCS Server Software versions antérieures à 4.2(3s) | ||
| Cisco | UCS | UCS XE-Series Server Firmware versions antérieures à 6.0(2.260143) | ||
| Cisco | UCS | UCS Server Software versions antérieures à 4.2(3r) | ||
| Cisco | UCS | UCS Server Software versions 4.3 antérieures à 4.3(2.260020) | ||
| Cisco | UCS | UCS Server Software versions antérieures à 4.3(6.260054) | ||
| Cisco | UCS | UCS Server Software versions 4.3 antérieures à 4.3(6h)1 | ||
| Cisco | UCS | UCSE Software versions antérieures à 4.15.4-b1 (Sep 2026) | ||
| Cisco | UCS | UCS Server Software versions 4.3 antérieures à 4.3(6.260054) |
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "UCS Server Software versions 6.0 ant\u00e9rieures \u00e0 6.0(2.260143)1",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions 1.2 and earlier ant\u00e9rieures \u00e0 Release no. TBD (Sep 2026)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions 6.0 ant\u00e9rieures \u00e0 6.0(2d)1",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "Intersight Server Firmware versions ant\u00e9rieures \u00e0 5.4(0.260050)1",
"product": {
"name": "Intersight Server",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "Intersight Server Firmware versions ant\u00e9rieures \u00e0 5.4(0.260042)",
"product": {
"name": "Intersight Server",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions 2.0 ant\u00e9rieures \u00e0 Release no. TBD (Oct 2026)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions ant\u00e9rieures \u00e0 4.3(6h)1",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions 4.0 ant\u00e9rieures \u00e0 4.0(2.260004)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCSE BIOS versions ant\u00e9rieures \u00e0 4.041 (Sep 2026)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "NFVIS versions ant\u00e9rieures \u00e0 4.15.7 (Oct 2026)",
"product": {
"name": "NFVIS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions ant\u00e9rieures \u00e0 4.2(3s)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS XE-Series Server Firmware versions ant\u00e9rieures \u00e0 6.0(2.260143)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions ant\u00e9rieures \u00e0 4.2(3r)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions 4.3 ant\u00e9rieures \u00e0 4.3(2.260020)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions ant\u00e9rieures \u00e0 4.3(6.260054)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions 4.3 ant\u00e9rieures \u00e0 4.3(6h)1",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCSE Software versions ant\u00e9rieures \u00e0 4.15.4-b1 (Sep 2026)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
},
{
"description": "UCS Server Software versions 4.3 ant\u00e9rieures \u00e0 4.3(6.260054)",
"product": {
"name": "UCS",
"vendor": {
"name": "Cisco",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-20293",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-20293"
}
],
"initial_release_date": "2026-09-09T00:00:00",
"last_revision_date": "2026-09-09T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1138",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-09-09T00:00:00.000000"
}
],
"risks": [
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
}
],
"summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans les produits Cisco. Elle permet \u00e0 un attaquant de provoquer un contournement de la politique de s\u00e9curit\u00e9.",
"title": "Vuln\u00e9rabilit\u00e9 dans les produits Cisco",
"vendor_advisories": [
{
"published_at": "2026-09-08",
"title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-ucs-uefi-sb-bypass-eb6xC5GW",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-uefi-sb-bypass-eb6xC5GW"
}
]
}
CVE-2026-20293 (GCVE-0-2026-20293)
Vulnerability from cvelistv5
Published
2026-09-08 16:04
Modified
2026-09-16 03:57
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-749 - Exposed Dangerous Method or Function
Summary
A vulnerability in the Unified Extensible Firmware Interface (UEFI) Shell implementation of Cisco UCS Servers and UCS-based appliances could allow an authenticated attacker with valid credentials for a user account with the role of user or admin or an unauthenticated attacker with physical access to an affected device to bypass UEFI Secure Boot validation checks and execute unauthorized software.
This vulnerability is due to the availability of memory write commands in the UEFI Shell while UEFI Secure Boot is enabled on a device. An attacker could exploit this vulnerability by selecting the UEFI Shell boot option at boot time and using available shell commands to modify UEFI memory variables. A successful exploit could allow the attacker to manipulate the preboot environment, overwrite UEFI Secure Boot-related memory values, and execute unauthorized software on the affected device.
References
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Enterprise NFV Infrastructure Software |
Version: 4.1.1 Version: 3.9.1 Version: 3.5.2 Version: 3.12.2 Version: 3.6.2 Version: 3.9.2 Version: 3.11.3 Version: 3.11.1 Version: 3.5.1 Version: 3.3.1 Version: 3.10.2 Version: 3.12.1b Version: 3.4.1 Version: 3.12.1a Version: 3.6.3 Version: 3.8.1 Version: 3.11.2 Version: 3.12.1 Version: 3.12.3 Version: 3.10.1 Version: 3.6.1 Version: 3.10.3 Version: 3.7.1 Version: 4.1.2 Version: 4.2.1 Version: 4.2.2 Version: 4.4.1 Version: 4.4.2 Version: 4.5.1 Version: 4.4.3 Version: 4.6.1 Version: 4.7.1 Version: 4.6.2-FC2 Version: 4.6.2 Version: 4.8.1 Version: 4.8.2 Version: 4.9.1 Version: 4.6.3 Version: 4.9.2 Version: 4.10.1 Version: 4.9.3 Version: 4.11.1 Version: 4.9.4 Version: 4.12.1 Version: 4.6.4 Version: 4.12.2 Version: 4.13.1 Version: 4.9.5 Version: 4.12.3 Version: 4.14.1 Version: 4.6.3-FC4 Version: 4.9.4-FC3 Version: 4.12.4 Version: 4.15.1 Version: 4.9.6 Version: 4.15.2 Version: 4.12.5 Version: 4.15.3 Version: 4.15.4 Version: 4.12.6 Version: 4.15.5 Version: 4.12.7 Version: 4.12.8 Version: 4.15.6 Version: 4.9.10 |
|||||||||||||||||
|
|||||||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-20293",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-11T13:32:52.855324Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-11T13:46:30.170Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Cisco Enterprise NFV Infrastructure Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "4.1.1"
},
{
"status": "affected",
"version": "3.9.1"
},
{
"status": "affected",
"version": "3.5.2"
},
{
"status": "affected",
"version": "3.12.2"
},
{
"status": "affected",
"version": "3.6.2"
},
{
"status": "affected",
"version": "3.9.2"
},
{
"status": "affected",
"version": "3.11.3"
},
{
"status": "affected",
"version": "3.11.1"
},
{
"status": "affected",
"version": "3.5.1"
},
{
"status": "affected",
"version": "3.3.1"
},
{
"status": "affected",
"version": "3.10.2"
},
{
"status": "affected",
"version": "3.12.1b"
},
{
"status": "affected",
"version": "3.4.1"
},
{
"status": "affected",
"version": "3.12.1a"
},
{
"status": "affected",
"version": "3.6.3"
},
{
"status": "affected",
"version": "3.8.1"
},
{
"status": "affected",
"version": "3.11.2"
},
{
"status": "affected",
"version": "3.12.1"
},
{
"status": "affected",
"version": "3.12.3"
},
{
"status": "affected",
"version": "3.10.1"
},
{
"status": "affected",
"version": "3.6.1"
},
{
"status": "affected",
"version": "3.10.3"
},
{
"status": "affected",
"version": "3.7.1"
},
{
"status": "affected",
"version": "4.1.2"
},
{
"status": "affected",
"version": "4.2.1"
},
{
"status": "affected",
"version": "4.2.2"
},
{
"status": "affected",
"version": "4.4.1"
},
{
"status": "affected",
"version": "4.4.2"
},
{
"status": "affected",
"version": "4.5.1"
},
{
"status": "affected",
"version": "4.4.3"
},
{
"status": "affected",
"version": "4.6.1"
},
{
"status": "affected",
"version": "4.7.1"
},
{
"status": "affected",
"version": "4.6.2-FC2"
},
{
"status": "affected",
"version": "4.6.2"
},
{
"status": "affected",
"version": "4.8.1"
},
{
"status": "affected",
"version": "4.8.2"
},
{
"status": "affected",
"version": "4.9.1"
},
{
"status": "affected",
"version": "4.6.3"
},
{
"status": "affected",
"version": "4.9.2"
},
{
"status": "affected",
"version": "4.10.1"
},
{
"status": "affected",
"version": "4.9.3"
},
{
"status": "affected",
"version": "4.11.1"
},
{
"status": "affected",
"version": "4.9.4"
},
{
"status": "affected",
"version": "4.12.1"
},
{
"status": "affected",
"version": "4.6.4"
},
{
"status": "affected",
"version": "4.12.2"
},
{
"status": "affected",
"version": "4.13.1"
},
{
"status": "affected",
"version": "4.9.5"
},
{
"status": "affected",
"version": "4.12.3"
},
{
"status": "affected",
"version": "4.14.1"
},
{
"status": "affected",
"version": "4.6.3-FC4"
},
{
"status": "affected",
"version": "4.9.4-FC3"
},
{
"status": "affected",
"version": "4.12.4"
},
{
"status": "affected",
"version": "4.15.1"
},
{
"status": "affected",
"version": "4.9.6"
},
{
"status": "affected",
"version": "4.15.2"
},
{
"status": "affected",
"version": "4.12.5"
},
{
"status": "affected",
"version": "4.15.3"
},
{
"status": "affected",
"version": "4.15.4"
},
{
"status": "affected",
"version": "4.12.6"
},
{
"status": "affected",
"version": "4.15.5"
},
{
"status": "affected",
"version": "4.12.7"
},
{
"status": "affected",
"version": "4.12.8"
},
{
"status": "affected",
"version": "4.15.6"
},
{
"status": "affected",
"version": "4.9.10"
}
]
},
{
"defaultStatus": "unknown",
"product": "Cisco Unified Computing System (Managed)",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "4.0(1a)"
},
{
"status": "affected",
"version": "4.1(1a)"
},
{
"status": "affected",
"version": "4.1(1b)"
},
{
"status": "affected",
"version": "4.0(4h)"
},
{
"status": "affected",
"version": "4.1(1c)"
},
{
"status": "affected",
"version": "4.0(4e)"
},
{
"status": "affected",
"version": "4.0(4g)"
},
{
"status": "affected",
"version": "4.0(2e)"
},
{
"status": "affected",
"version": "4.0(4a)"
},
{
"status": "affected",
"version": "4.0(2d)"
},
{
"status": "affected",
"version": "4.0(1b)"
},
{
"status": "affected",
"version": "4.0(4f)"
},
{
"status": "affected",
"version": "4.0(4c)"
},
{
"status": "affected",
"version": "4.0(1c)"
},
{
"status": "affected",
"version": "4.0(4b)"
},
{
"status": "affected",
"version": "4.0(2b)"
},
{
"status": "affected",
"version": "4.0(4d)"
},
{
"status": "affected",
"version": "4.0(2a)"
},
{
"status": "affected",
"version": "4.0(1d)"
},
{
"status": "affected",
"version": "4.0(4i)"
},
{
"status": "affected",
"version": "4.1(1d)"
},
{
"status": "affected",
"version": "4.1(2a)"
},
{
"status": "affected",
"version": "4.1(1e)"
},
{
"status": "affected",
"version": "4.1(2b)"
},
{
"status": "affected",
"version": "4.0(4k)"
},
{
"status": "affected",
"version": "4.1(3a)"
},
{
"status": "affected",
"version": "4.1(3b)"
},
{
"status": "affected",
"version": "4.1(2c)"
},
{
"status": "affected",
"version": "4.0(4l)"
},
{
"status": "affected",
"version": "4.1(4a)"
},
{
"status": "affected",
"version": "4.1(3c)"
},
{
"status": "affected",
"version": "4.1(3d)"
},
{
"status": "affected",
"version": "4.2(1c)"
},
{
"status": "affected",
"version": "4.2(1d)"
},
{
"status": "affected",
"version": "4.0(4m)"
},
{
"status": "affected",
"version": "4.1(3e)"
},
{
"status": "affected",
"version": "4.2(1f)"
},
{
"status": "affected",
"version": "4.1(3f)"
},
{
"status": "affected",
"version": "4.2(1i)"
},
{
"status": "affected",
"version": "4.2(1k)"
},
{
"status": "affected",
"version": "4.0(4n)"
},
{
"status": "affected",
"version": "4.1(3h)"
},
{
"status": "affected",
"version": "4.2(1l)"
},
{
"status": "affected",
"version": "4.2(1m)"
},
{
"status": "affected",
"version": "4.1(3i)"
},
{
"status": "affected",
"version": "4.2(2a)"
},
{
"status": "affected",
"version": "4.2(1n)"
},
{
"status": "affected",
"version": "4.1(3j)"
},
{
"status": "affected",
"version": "4.2(2c)"
},
{
"status": "affected",
"version": "4.2(2d)"
},
{
"status": "affected",
"version": "4.2(3b)"
},
{
"status": "affected",
"version": "4.1(3k)"
},
{
"status": "affected",
"version": "4.0(4o)"
},
{
"status": "affected",
"version": "4.2(2e)"
},
{
"status": "affected",
"version": "4.2(3d)"
},
{
"status": "affected",
"version": "4.2(3e)"
},
{
"status": "affected",
"version": "4.2(3g)"
},
{
"status": "affected",
"version": "4.1(3l)"
},
{
"status": "affected",
"version": "4.3(2b)"
},
{
"status": "affected",
"version": "4.2(3h)"
},
{
"status": "affected",
"version": "4.2(3i)"
},
{
"status": "affected",
"version": "4.3(2c)"
},
{
"status": "affected",
"version": "4.1(3m)"
},
{
"status": "affected",
"version": "4.3(2e)"
},
{
"status": "affected",
"version": "4.3(3a)"
},
{
"status": "affected",
"version": "4.2(3j)"
},
{
"status": "affected",
"version": "4.3(3c)"
},
{
"status": "affected",
"version": "4.3(4a)"
},
{
"status": "affected",
"version": "4.2(3k)"
},
{
"status": "affected",
"version": "4.3(4b)"
},
{
"status": "affected",
"version": "4.3(4c)"
},
{
"status": "affected",
"version": "4.2(3l)"
},
{
"status": "affected",
"version": "4.3(4d)"
},
{
"status": "affected",
"version": "4.2(3m)"
},
{
"status": "affected",
"version": "4.3(2f)"
},
{
"status": "affected",
"version": "4.3(5a)"
},
{
"status": "affected",
"version": "4.3(4e)"
},
{
"status": "affected",
"version": "4.1(3n)"
},
{
"status": "affected",
"version": "4.3(4f)"
},
{
"status": "affected",
"version": "4.2(3n)"
},
{
"status": "affected",
"version": "4.3(5c)"
},
{
"status": "affected",
"version": "4.2(3o)"
},
{
"status": "affected",
"version": "4.3(5d)"
},
{
"status": "affected",
"version": "4.3(6a)"
},
{
"status": "affected",
"version": "4.3(6b)"
},
{
"status": "affected",
"version": "4.3(5e)"
},
{
"status": "affected",
"version": "4.3(6c)"
},
{
"status": "affected",
"version": "6.0(1b)"
},
{
"status": "affected",
"version": "4.2(3p)"
},
{
"status": "affected",
"version": "6.0(1c)"
},
{
"status": "affected",
"version": "4.3(6d)"
},
{
"status": "affected",
"version": "6.0(1d)"
},
{
"status": "affected",
"version": "6.0(1e)"
},
{
"status": "affected",
"version": "4.3(6e)"
},
{
"status": "affected",
"version": "6.0(1f)"
},
{
"status": "affected",
"version": "4.3(6f)"
},
{
"status": "affected",
"version": "6.0(2b)"
},
{
"status": "affected",
"version": "6.0(1h)"
},
{
"status": "affected",
"version": "4.2(3r)"
},
{
"status": "affected",
"version": "6.0(2c)"
},
{
"status": "affected",
"version": "4.3(6g)"
}
]
},
{
"defaultStatus": "unknown",
"product": "Cisco Unified Computing System (Standalone)",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "4.0(2g)"
},
{
"status": "affected",
"version": "3.1(2i)"
},
{
"status": "affected",
"version": "3.1(1d)"
},
{
"status": "affected",
"version": "4.0(4i)"
},
{
"status": "affected",
"version": "4.1(1c)"
},
{
"status": "affected",
"version": "4.0(2c)"
},
{
"status": "affected",
"version": "4.0(1e)"
},
{
"status": "affected",
"version": "4.0(2h)"
},
{
"status": "affected",
"version": "4.0(4h)"
},
{
"status": "affected",
"version": "4.0(1h)"
},
{
"status": "affected",
"version": "4.0(2l)"
},
{
"status": "affected",
"version": "3.1(3g)"
},
{
"status": "affected",
"version": "4.0(1.240)"
},
{
"status": "affected",
"version": "4.0(2f)"
},
{
"status": "affected",
"version": "4.0(1g)"
},
{
"status": "affected",
"version": "4.0(2i)"
},
{
"status": "affected",
"version": "3.1(3i)"
},
{
"status": "affected",
"version": "4.0(4d)"
},
{
"status": "affected",
"version": "4.1(1d)"
},
{
"status": "affected",
"version": "3.1(3c)"
},
{
"status": "affected",
"version": "4.0(4k)"
},
{
"status": "affected",
"version": "3.1(2d)"
},
{
"status": "affected",
"version": "3.1(3a)"
},
{
"status": "affected",
"version": "3.1(3j)"
},
{
"status": "affected",
"version": "4.0(2d)"
},
{
"status": "affected",
"version": "4.1(1f)"
},
{
"status": "affected",
"version": "4.0(4j)"
},
{
"status": "affected",
"version": "4.0(2m)"
},
{
"status": "affected",
"version": "4.0(2k)"
},
{
"status": "affected",
"version": "4.0(1c)"
},
{
"status": "affected",
"version": "4.0(4f)"
},
{
"status": "affected",
"version": "4.0(4c)"
},
{
"status": "affected",
"version": "3.1(3d)"
},
{
"status": "affected",
"version": "3.1(2g)"
},
{
"status": "affected",
"version": "3.1(2c)"
},
{
"status": "affected",
"version": "4.0(1d)"
},
{
"status": "affected",
"version": "3.1(2e)"
},
{
"status": "affected",
"version": "4.0(1a)"
},
{
"status": "affected",
"version": "4.0(1b)"
},
{
"status": "affected",
"version": "3.1(3b)"
},
{
"status": "affected",
"version": "4.0(4b)"
},
{
"status": "affected",
"version": "3.1(2b)"
},
{
"status": "affected",
"version": "4.0(4e)"
},
{
"status": "affected",
"version": "3.1(3h)"
},
{
"status": "affected",
"version": "4.0(4l)"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "4.1(2a)"
},
{
"status": "affected",
"version": "4.0(2n)"
},
{
"status": "affected",
"version": "4.1(1h)"
},
{
"status": "affected",
"version": "3.1(3k)"
},
{
"status": "affected",
"version": "4.1(2b)"
},
{
"status": "affected",
"version": "4.0(2o)"
},
{
"status": "affected",
"version": "4.0(4m)"
},
{
"status": "affected",
"version": "4.1(2d)"
},
{
"status": "affected",
"version": "4.1(3b)"
},
{
"status": "affected",
"version": "4.0(2p)"
},
{
"status": "affected",
"version": "4.1(2e)"
},
{
"status": "affected",
"version": "4.1(2f)"
},
{
"status": "affected",
"version": "4.0(4n)"
},
{
"status": "affected",
"version": "4.0(2q)"
},
{
"status": "affected",
"version": "4.1(3c)"
},
{
"status": "affected",
"version": "4.0(2r)"
},
{
"status": "affected",
"version": "4.1(3d)"
},
{
"status": "affected",
"version": "4.1(2g)"
},
{
"status": "affected",
"version": "4.1(2h)"
},
{
"status": "affected",
"version": "4.1(3g)"
},
{
"status": "affected",
"version": "4.1(3f)"
},
{
"status": "affected",
"version": "4.1(2j)"
},
{
"status": "affected",
"version": "4.1(2k)"
},
{
"status": "affected",
"version": "4.1(3h)"
},
{
"status": "affected",
"version": "4.2(2a)"
},
{
"status": "affected",
"version": "4.1(3i)"
},
{
"status": "affected",
"version": "4.2(2f)"
},
{
"status": "affected",
"version": "4.2(2g)"
},
{
"status": "affected",
"version": "4.2(3b)"
},
{
"status": "affected",
"version": "4.1(3l)"
},
{
"status": "affected",
"version": "4.2(3d)"
},
{
"status": "affected",
"version": "4.3(1.230097)"
},
{
"status": "affected",
"version": "4.2(1e)"
},
{
"status": "affected",
"version": "4.2(1b)"
},
{
"status": "affected",
"version": "4.2(1j)"
},
{
"status": "affected",
"version": "4.2(1i)"
},
{
"status": "affected",
"version": "4.2(1f)"
},
{
"status": "affected",
"version": "4.2(1a)"
},
{
"status": "affected",
"version": "4.2(1c)"
},
{
"status": "affected",
"version": "4.2(1g)"
},
{
"status": "affected",
"version": "4.3(1.230124)"
},
{
"status": "affected",
"version": "4.1(2l)"
},
{
"status": "affected",
"version": "4.2(3e)"
},
{
"status": "affected",
"version": "4.3(1.230138)"
},
{
"status": "affected",
"version": "4.2(3g)"
},
{
"status": "affected",
"version": "4.3(2.230207)"
},
{
"status": "affected",
"version": "4.2(3h)"
},
{
"status": "affected",
"version": "4.2(3i)"
},
{
"status": "affected",
"version": "4.3(2.230270)"
},
{
"status": "affected",
"version": "4.1(3m)"
},
{
"status": "affected",
"version": "4.1(2m)"
},
{
"status": "affected",
"version": "4.3(2.240002)"
},
{
"status": "affected",
"version": "4.3(3.240022)"
},
{
"status": "affected",
"version": "4.2(3j)"
},
{
"status": "affected",
"version": "4.1(3n)"
},
{
"status": "affected",
"version": "4.3(2.240009)"
},
{
"status": "affected",
"version": "4.3(3.240041)"
},
{
"status": "affected",
"version": "4.2(3k)"
},
{
"status": "affected",
"version": "4.3(3.240043)"
},
{
"status": "affected",
"version": "4.3(4.240142)"
},
{
"status": "affected",
"version": "4.3(2.240037)"
},
{
"status": "affected",
"version": "4.3(2.240053)"
},
{
"status": "affected",
"version": "4.3(4.240152)"
},
{
"status": "affected",
"version": "4.2(3l)"
},
{
"status": "affected",
"version": "4.3(2.240077)"
},
{
"status": "affected",
"version": "4.3(4.242028)"
},
{
"status": "affected",
"version": "4.3(4.241063)"
},
{
"status": "affected",
"version": "4.3(4.242038)"
},
{
"status": "affected",
"version": "4.2(3m)"
},
{
"status": "affected",
"version": "4.3(2.240090)"
},
{
"status": "affected",
"version": "4.3(5.240021)"
},
{
"status": "affected",
"version": "4.3(2.240107)"
},
{
"status": "affected",
"version": "4.3(4.242066)"
},
{
"status": "affected",
"version": "4.2(3n)"
},
{
"status": "affected",
"version": "4.3(5.250001)"
},
{
"status": "affected",
"version": "4.2(3o)"
},
{
"status": "affected",
"version": "4.3(2.250016)"
},
{
"status": "affected",
"version": "4.3(2.250021)"
},
{
"status": "affected",
"version": "4.3(5.250030)"
},
{
"status": "affected",
"version": "4.3(2.250022)"
},
{
"status": "affected",
"version": "4.3(6.250039)"
},
{
"status": "affected",
"version": "4.3(6.250040)"
},
{
"status": "affected",
"version": "4.3(5.250033)"
},
{
"status": "affected",
"version": "4.3(6.250044)"
},
{
"status": "affected",
"version": "4.3(6.250053)"
},
{
"status": "affected",
"version": "4.3(2.250037)"
},
{
"status": "affected",
"version": "4.3(2.250045)"
},
{
"status": "affected",
"version": "4.3(4.252001)"
},
{
"status": "affected",
"version": "4.3(4.252002)"
},
{
"status": "affected",
"version": "6.0(1.250127)"
},
{
"status": "affected",
"version": "4.2(3p)"
},
{
"status": "affected",
"version": "6.0(1.250131)"
},
{
"status": "affected",
"version": "4.3(6.250101)"
},
{
"status": "affected",
"version": "6.0(1.250174)"
},
{
"status": "affected",
"version": "4.3(6.250117)"
},
{
"status": "affected",
"version": "4.3(5.250043)"
},
{
"status": "affected",
"version": "4.3(5.250045)"
},
{
"status": "affected",
"version": "4.3(6.250060)"
},
{
"status": "affected",
"version": "6.0(1.250130)"
},
{
"status": "affected",
"version": "4.3(4.241014)"
},
{
"status": "affected",
"version": "6.0(1.251030)"
},
{
"status": "affected",
"version": "4.3(2.250063)"
},
{
"status": "affected",
"version": "6.0(1.250192)"
},
{
"status": "affected",
"version": "4.3(6.260003)"
},
{
"status": "affected",
"version": "6.0(1.250194)"
},
{
"status": "affected",
"version": "6.0(1.260001)"
},
{
"status": "affected",
"version": "4.3(6.260017)"
},
{
"status": "affected",
"version": "4.3(2.260007)"
},
{
"status": "affected",
"version": "6.0(2.260044)"
},
{
"status": "affected",
"version": "6.0(2.260042)"
},
{
"status": "affected",
"version": "4.0(1.260003)"
},
{
"status": "affected",
"version": "2.0(2.260062)"
},
{
"status": "affected",
"version": "2.0(1.250127)"
},
{
"status": "affected",
"version": "2.0(1.250096)"
},
{
"status": "affected",
"version": "4.0(1.260004)"
},
{
"status": "affected",
"version": "6.0(2.260026)"
},
{
"status": "affected",
"version": "6.0(1.251006)"
},
{
"status": "affected",
"version": "1.2(0.250011)"
},
{
"status": "affected",
"version": "1.1(0.250016)"
},
{
"status": "affected",
"version": "1.0(0.240001)"
},
{
"status": "affected",
"version": "1.0(0.250003)"
},
{
"status": "affected",
"version": "1.2(0.250013)"
},
{
"status": "affected",
"version": "1.1(0.250026)"
},
{
"status": "affected",
"version": "1.0(1.250002)"
},
{
"status": "affected",
"version": "1.1(0.250022)"
},
{
"status": "affected",
"version": "1.1(0.250025)"
},
{
"status": "affected",
"version": "1.0(1.250032)"
},
{
"status": "affected",
"version": "6.0(2.260034)"
},
{
"status": "affected",
"version": "6.0(2.260069)"
},
{
"status": "affected",
"version": "4.3(6.260033)"
},
{
"status": "affected",
"version": "2.0(2.260101)"
},
{
"status": "affected",
"version": "4.2(3q)"
},
{
"status": "affected",
"version": "4.2(3r)"
},
{
"status": "affected",
"version": "1.2(0.260005)"
}
]
},
{
"defaultStatus": "unknown",
"product": "Cisco Unified Computing System E-Series Software (UCSE)",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "4.11.1"
},
{
"status": "affected",
"version": "4.12.1"
},
{
"status": "affected",
"version": "4.12.2"
},
{
"status": "affected",
"version": "4.15.2"
},
{
"status": "affected",
"version": "4.15.3"
},
{
"status": "affected",
"version": "4.15.4"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Unified Extensible Firmware Interface (UEFI) Shell implementation of Cisco UCS Servers and UCS-based appliances could allow an authenticated attacker with valid credentials for a user account with the role of user or admin\u0026nbsp;or an unauthenticated attacker with physical access to an affected device to bypass UEFI Secure Boot validation checks and execute unauthorized software.\r\n\r\nThis vulnerability is due to the availability of memory write commands in the UEFI Shell while UEFI Secure Boot is enabled on a device. An attacker could exploit this vulnerability by selecting the UEFI Shell boot option at boot time and using available shell commands to modify UEFI memory variables. A successful exploit could allow the attacker to manipulate the preboot environment, overwrite UEFI Secure Boot-related memory values, and execute unauthorized software on the affected device."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerability described in this advisory.\r\n\r\nThe Cisco PSIRT is not aware of any malicious use of the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-749",
"description": "Exposed Dangerous Method or Function",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T03:57:05.926Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-ucs-uefi-sb-bypass-eb6xC5GW",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-uefi-sb-bypass-eb6xC5GW"
}
],
"source": {
"advisory": "cisco-sa-ucs-uefi-sb-bypass-eb6xC5GW",
"defects": [
"CSCwt77804"
],
"discovery": "EXTERNAL"
},
"title": "Cisco UCS and UCS-Based Appliances UEFI Shell Secure Boot Bypass Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20293",
"datePublished": "2026-09-08T16:04:40.874Z",
"dateReserved": "2025-10-08T11:59:15.405Z",
"dateUpdated": "2026-09-16T03:57:05.926Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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