CVE-2026-20172 (GCVE-0-2026-20172)
Vulnerability from cvelistv5
Published
2026-05-06 16:15
Modified
2026-05-06 17:46
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
Summary
A vulnerability in the Lite Agent feature of Cisco Enterprise Chat and Email (ECE) could allow an authenticated, remote attacker to conduct browser-based attacks. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Agent.
This vulnerability is due to inadequate validation of file contents during file upload operations. An attacker could exploit this vulnerability by uploading a file that contains malicious scripts or HTML code, which the application could make available to other users to access. A successful exploit could allow the attacker to execute the contents of that file in the browser of a user and conduct browser-based attacks.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco Enterprise Chat and Email |
Version: 11.6(1)_ES3 Version: 11.6(1)_ES4 Version: 12.0(1)_ES6 Version: 11.6(1)_ES8 Version: 12.0(1)_ES5a Version: 11.6(1)_ES9 Version: 12.0(1)_ES6_ET1 Version: 11.6(1)_ES6 Version: 11.6(1)_ES5 Version: 12.5(1)_ET1 Version: 12.5(1) Version: 12.5(1)_ES3_ET1 Version: 12.0(1)_ES3 Version: 11.6(1)_ES11 Version: 12.0(1)_ES4 Version: 12.0(1)_ES5 Version: 11.6(1)_ES2 Version: 11.6(1)_ES9a Version: 11.6(1)_ES10 Version: 12.0(1)_ES1 Version: 12.0(1) Version: 12.5(1)_ES3 Version: 12.6(1) Version: 11.5(1) Version: 12.0(1)_ES2 Version: 11.6(1)_ES7 Version: 12.5(1)_ES2 Version: 12.6(1)_ET1 Version: 11.6(1) Version: 12.5(1)_ES1 Version: 12.6(1)_ET2 Version: 12.5(1)_ES3_ET2 Version: 12.0(1)_ES6_ET2 Version: 12.6(1)_ES1 Version: 12.5(1)_ES4 Version: 11.6(1)_ES12 Version: 12.6(1)_ET3 Version: 12.5(1)_ES4_ET1 Version: 12.0(1)_ES6_ET3 Version: 12.6(1)_ES1_ET1 Version: 12.6(1)_ES2 Version: 12.6_ES2_ET1 Version: 12.5(1)_ES5 Version: 12.6_ES2_ET2 Version: 12.0(1)_ES7 Version: 12.6_ES2_ET3 Version: 12.0(1)_ES7_ET1 Version: 12.5(1)_ES5_ET1 Version: 12.6_ES2_ET4 Version: 12.6(1)_ES3 Version: 11.6(1)_ES12_ET1 Version: 12.6_ES3_ET1 Version: 12.5(1)_ES6 Version: 12.6_ES3_ET2 Version: 12.6(1)_ES4 Version: 12.5(1)_ES7 Version: 12.6(1)_ES4_ET1 Version: 12.6(1)_ES5 Version: 12.6(1)_ES5_ET1 Version: 12.6(1)_ES5_ET2 Version: 12.6(1)_ES6 Version: 12.6(1)_ES6_ET1 Version: 12.5(1)_ES8 Version: 12.6(1)_ES6_ET2 Version: 12.6(1)_ES7 Version: 12.6(1)_ES8 Version: 12.6(1)_ES4_ET2 Version: 12.6(1)_ES3_ET3 Version: 12.6(1)_ES2_ET5 Version: 12.6(1)_ES1_ET2 Version: 12.6(1)_ES8_ET1 Version: 12.6(1)_ES7_ET1 Version: 12.6(1)_ES6_ET3 Version: 12.6(1)_ES5_ET3 Version: 12.5(1)_ES8_ET1 Version: 12.5(1)_ES3_ET3 Version: 12.5(1)_ES5_ET2 Version: 12.5(1)_ES6_ET1 Version: 12.5(1)_ES4_ET2 Version: 12.5(1)_ES7_ET1 Version: 12.6(1)_ES8_ET2 Version: 12.6(1)_ES9 Version: 12.6(1)_ES9_ET1 Version: 12.5(1)_ES9 Version: 12.6(1)_ES9_ET2 Version: 12.6(1)_ES9_ET3 Version: 12.6(1)_ES10 Version: 12.6(1)_ES10_ET1 Version: 15.0(1) Version: 12.6(1)_ES11 Version: 15.0(1)_ET1 Version: 15.0(1)ES202508 Version: 12.6(1)_ES11_ET1 Version: 12.6(1)_ES11_ET2 Version: 12.6(1)_ES12 Version: 15.0(1)ES202511 Version: 12.6(1)_ES12_ET1 Version: 15.0(1)ES202511_ET1 Version: 12.5(1)_ES10 |
{
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"metrics": [
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"other": {
"content": {
"id": "CVE-2026-20172",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-06T17:45:56.726902Z",
"version": "2.0.3"
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"providerMetadata": {
"dateUpdated": "2026-05-06T17:46:04.178Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"cna": {
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"product": "Cisco Enterprise Chat and Email",
"vendor": "Cisco",
"versions": [
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"status": "affected",
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{
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"version": "11.6(1)_ES4"
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{
"status": "affected",
"version": "12.0(1)_ES6"
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{
"status": "affected",
"version": "11.6(1)_ES8"
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"version": "12.0(1)_ES5a"
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{
"status": "affected",
"version": "11.6(1)_ES9"
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{
"status": "affected",
"version": "12.0(1)_ES6_ET1"
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{
"status": "affected",
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"status": "affected",
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{
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{
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{
"status": "affected",
"version": "12.0(1)_ES3"
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{
"status": "affected",
"version": "11.6(1)_ES11"
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{
"status": "affected",
"version": "12.0(1)_ES4"
},
{
"status": "affected",
"version": "12.0(1)_ES5"
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{
"status": "affected",
"version": "11.6(1)_ES2"
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{
"status": "affected",
"version": "11.6(1)_ES9a"
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{
"status": "affected",
"version": "11.6(1)_ES10"
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{
"status": "affected",
"version": "12.0(1)_ES1"
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{
"status": "affected",
"version": "12.0(1)"
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{
"status": "affected",
"version": "12.5(1)_ES3"
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{
"status": "affected",
"version": "12.6(1)"
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{
"status": "affected",
"version": "11.5(1)"
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{
"status": "affected",
"version": "12.0(1)_ES2"
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{
"status": "affected",
"version": "11.6(1)_ES7"
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{
"status": "affected",
"version": "12.5(1)_ES2"
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{
"status": "affected",
"version": "12.6(1)_ET1"
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{
"status": "affected",
"version": "11.6(1)"
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{
"status": "affected",
"version": "12.5(1)_ES1"
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{
"status": "affected",
"version": "12.6(1)_ET2"
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{
"status": "affected",
"version": "12.5(1)_ES3_ET2"
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{
"status": "affected",
"version": "12.0(1)_ES6_ET2"
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{
"status": "affected",
"version": "12.6(1)_ES1"
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{
"status": "affected",
"version": "12.5(1)_ES4"
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{
"status": "affected",
"version": "11.6(1)_ES12"
},
{
"status": "affected",
"version": "12.6(1)_ET3"
},
{
"status": "affected",
"version": "12.5(1)_ES4_ET1"
},
{
"status": "affected",
"version": "12.0(1)_ES6_ET3"
},
{
"status": "affected",
"version": "12.6(1)_ES1_ET1"
},
{
"status": "affected",
"version": "12.6(1)_ES2"
},
{
"status": "affected",
"version": "12.6_ES2_ET1"
},
{
"status": "affected",
"version": "12.5(1)_ES5"
},
{
"status": "affected",
"version": "12.6_ES2_ET2"
},
{
"status": "affected",
"version": "12.0(1)_ES7"
},
{
"status": "affected",
"version": "12.6_ES2_ET3"
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{
"status": "affected",
"version": "12.0(1)_ES7_ET1"
},
{
"status": "affected",
"version": "12.5(1)_ES5_ET1"
},
{
"status": "affected",
"version": "12.6_ES2_ET4"
},
{
"status": "affected",
"version": "12.6(1)_ES3"
},
{
"status": "affected",
"version": "11.6(1)_ES12_ET1"
},
{
"status": "affected",
"version": "12.6_ES3_ET1"
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{
"status": "affected",
"version": "12.5(1)_ES6"
},
{
"status": "affected",
"version": "12.6_ES3_ET2"
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{
"status": "affected",
"version": "12.6(1)_ES4"
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{
"status": "affected",
"version": "12.5(1)_ES7"
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{
"status": "affected",
"version": "12.6(1)_ES4_ET1"
},
{
"status": "affected",
"version": "12.6(1)_ES5"
},
{
"status": "affected",
"version": "12.6(1)_ES5_ET1"
},
{
"status": "affected",
"version": "12.6(1)_ES5_ET2"
},
{
"status": "affected",
"version": "12.6(1)_ES6"
},
{
"status": "affected",
"version": "12.6(1)_ES6_ET1"
},
{
"status": "affected",
"version": "12.5(1)_ES8"
},
{
"status": "affected",
"version": "12.6(1)_ES6_ET2"
},
{
"status": "affected",
"version": "12.6(1)_ES7"
},
{
"status": "affected",
"version": "12.6(1)_ES8"
},
{
"status": "affected",
"version": "12.6(1)_ES4_ET2"
},
{
"status": "affected",
"version": "12.6(1)_ES3_ET3"
},
{
"status": "affected",
"version": "12.6(1)_ES2_ET5"
},
{
"status": "affected",
"version": "12.6(1)_ES1_ET2"
},
{
"status": "affected",
"version": "12.6(1)_ES8_ET1"
},
{
"status": "affected",
"version": "12.6(1)_ES7_ET1"
},
{
"status": "affected",
"version": "12.6(1)_ES6_ET3"
},
{
"status": "affected",
"version": "12.6(1)_ES5_ET3"
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{
"status": "affected",
"version": "12.5(1)_ES8_ET1"
},
{
"status": "affected",
"version": "12.5(1)_ES3_ET3"
},
{
"status": "affected",
"version": "12.5(1)_ES5_ET2"
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{
"status": "affected",
"version": "12.5(1)_ES6_ET1"
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{
"status": "affected",
"version": "12.5(1)_ES4_ET2"
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{
"status": "affected",
"version": "12.5(1)_ES7_ET1"
},
{
"status": "affected",
"version": "12.6(1)_ES8_ET2"
},
{
"status": "affected",
"version": "12.6(1)_ES9"
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{
"status": "affected",
"version": "12.6(1)_ES9_ET1"
},
{
"status": "affected",
"version": "12.5(1)_ES9"
},
{
"status": "affected",
"version": "12.6(1)_ES9_ET2"
},
{
"status": "affected",
"version": "12.6(1)_ES9_ET3"
},
{
"status": "affected",
"version": "12.6(1)_ES10"
},
{
"status": "affected",
"version": "12.6(1)_ES10_ET1"
},
{
"status": "affected",
"version": "15.0(1)"
},
{
"status": "affected",
"version": "12.6(1)_ES11"
},
{
"status": "affected",
"version": "15.0(1)_ET1"
},
{
"status": "affected",
"version": "15.0(1)ES202508"
},
{
"status": "affected",
"version": "12.6(1)_ES11_ET1"
},
{
"status": "affected",
"version": "12.6(1)_ES11_ET2"
},
{
"status": "affected",
"version": "12.6(1)_ES12"
},
{
"status": "affected",
"version": "15.0(1)ES202511"
},
{
"status": "affected",
"version": "12.6(1)_ES12_ET1"
},
{
"status": "affected",
"version": "15.0(1)ES202511_ET1"
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{
"status": "affected",
"version": "12.5(1)_ES10"
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]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Lite Agent feature of Cisco Enterprise Chat and Email (ECE) could allow an authenticated, remote attacker to conduct browser-based attacks. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Agent.\r\n\r\nThis vulnerability is due to inadequate validation of file contents during file upload operations. An attacker could exploit this vulnerability by uploading a file that contains malicious scripts or HTML code, which the application could make available to other users to access. A successful exploit could allow the attacker to execute the contents of that file in the browser of a user and conduct browser-based attacks.\u0026nbsp;"
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-646",
"description": "Reliance on File Name or Extension of Externally-Supplied File",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-06T16:15:37.789Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-ece-lite-agent-BCgSN8eb",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ece-lite-agent-BCgSN8eb"
}
],
"source": {
"advisory": "cisco-sa-ece-lite-agent-BCgSN8eb",
"defects": [
"CSCws79262"
],
"discovery": "EXTERNAL"
},
"title": "Cisco Enterprise Chat and Email Lite Agent File Upload Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20172",
"datePublished": "2026-05-06T16:15:37.789Z",
"dateReserved": "2025-10-08T11:59:15.391Z",
"dateUpdated": "2026-05-06T17:46:04.178Z",
"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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