CVE-2026-20110 (GCVE-0-2026-20110)
Vulnerability from cvelistv5
Published
2026-03-25 16:06
Modified
2026-03-27 15:01
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-266 - Incorrect Privilege Assignment
Summary
A vulnerability in the CLI of Cisco IOS XE Software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability exists because incorrect privileges are associated with the start maintenance command. An attacker could exploit this vulnerability by accessing the management CLI of the affected device as a low-privileged user and using the start maintenance command. A successful exploit could allow the attacker to put the device in maintenance mode, which shuts down interfaces, resulting in a denial of service (DoS) condition. In case of exploitation, a device administrator can connect to the CLI and use the stop maintenance command to restore operations.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco IOS XE Software |
Version: 16.6.1 Version: 16.6.2 Version: 16.6.3 Version: 16.6.4 Version: 16.6.5 Version: 16.6.4a Version: 16.6.5a Version: 16.6.6 Version: 16.6.7 Version: 16.6.8 Version: 16.6.9 Version: 16.6.10 Version: 16.7.1 Version: 16.7.1a Version: 16.7.1b Version: 16.7.2 Version: 16.7.3 Version: 16.7.4 Version: 16.8.1 Version: 16.8.1a Version: 16.8.1b Version: 16.8.1s Version: 16.8.1c Version: 16.8.1d Version: 16.8.2 Version: 16.8.1e Version: 16.8.3 Version: 16.9.1 Version: 16.9.2 Version: 16.9.1a Version: 16.9.1b Version: 16.9.1s Version: 16.9.3 Version: 16.9.4 Version: 16.9.3a Version: 16.9.5 Version: 16.9.5f Version: 16.9.6 Version: 16.9.7 Version: 16.9.8 Version: 16.10.1 Version: 16.10.1a Version: 16.10.1b Version: 16.10.1s Version: 16.10.1c Version: 16.10.1e Version: 16.10.1d Version: 16.10.2 Version: 16.10.1f Version: 16.10.1g Version: 16.10.3 Version: 16.11.1 Version: 16.11.1a Version: 16.11.1b Version: 16.11.2 Version: 16.11.1s Version: 16.12.1 Version: 16.12.1s Version: 16.12.1a Version: 16.12.1c Version: 16.12.1w Version: 16.12.2 Version: 16.12.1y Version: 16.12.2a Version: 16.12.3 Version: 16.12.8 Version: 16.12.2s Version: 16.12.1x Version: 16.12.1t Version: 16.12.4 Version: 16.12.3s Version: 16.12.3a Version: 16.12.4a Version: 16.12.5 Version: 16.12.6 Version: 16.12.1z1 Version: 16.12.5a Version: 16.12.5b Version: 16.12.1z2 Version: 16.12.6a Version: 16.12.7 Version: 16.12.9 Version: 16.12.10 Version: 16.12.10a Version: 16.12.11 Version: 16.12.12 Version: 16.12.13 Version: 16.12.14 Version: 17.1.1 Version: 17.1.1a Version: 17.1.1s Version: 17.1.1t Version: 17.1.3 Version: 17.2.1 Version: 17.2.1r Version: 17.2.1a Version: 17.2.1v Version: 17.2.2 Version: 17.2.3 Version: 17.3.1 Version: 17.3.2 Version: 17.3.3 Version: 17.3.1a Version: 17.3.1w Version: 17.3.2a Version: 17.3.1x Version: 17.3.1z Version: 17.3.4 Version: 17.3.5 Version: 17.3.4a Version: 17.3.6 Version: 17.3.4b Version: 17.3.4c Version: 17.3.5a Version: 17.3.5b Version: 17.3.7 Version: 17.3.8 Version: 17.3.8a Version: 17.4.1 Version: 17.4.2 Version: 17.4.1a Version: 17.4.1b Version: 17.4.2a Version: 17.5.1 Version: 17.5.1a Version: 17.6.1 Version: 17.6.2 Version: 17.6.1w Version: 17.6.1a Version: 17.6.1x Version: 17.6.3 Version: 17.6.1y Version: 17.6.1z Version: 17.6.3a Version: 17.6.4 Version: 17.6.1z1 Version: 17.6.5 Version: 17.6.6 Version: 17.6.6a Version: 17.6.5a Version: 17.6.7 Version: 17.6.8 Version: 17.6.8a Version: 17.7.1 Version: 17.7.1a Version: 17.7.1b Version: 17.7.2 Version: 17.10.1 Version: 17.10.1a Version: 17.10.1b Version: 17.8.1 Version: 17.8.1a Version: 17.9.1 Version: 17.9.1w Version: 17.9.2 Version: 17.9.1a Version: 17.9.1x Version: 17.9.1y Version: 17.9.3 Version: 17.9.2a Version: 17.9.1x1 Version: 17.9.3a Version: 17.9.4 Version: 17.9.1y1 Version: 17.9.5 Version: 17.9.4a Version: 17.9.5a Version: 17.9.5b Version: 17.9.6 Version: 17.9.6a Version: 17.9.7 Version: 17.9.5e Version: 17.9.5f Version: 17.9.8 Version: 17.9.7a Version: 17.9.7b Version: 17.11.1 Version: 17.11.1a Version: 17.12.1 Version: 17.12.1w Version: 17.12.1a Version: 17.12.1x Version: 17.12.2 Version: 17.12.3 Version: 17.12.2a Version: 17.12.1y Version: 17.12.1z Version: 17.12.4 Version: 17.12.3a Version: 17.12.1z1 Version: 17.12.1z2 Version: 17.12.4a Version: 17.12.5 Version: 17.12.4b Version: 17.12.1z3 Version: 17.12.5a Version: 17.12.1z4 Version: 17.12.6 Version: 17.12.5b Version: 17.12.5c Version: 17.12.6a Version: 17.12.5d Version: 17.12.6b Version: 17.13.1 Version: 17.13.1a Version: 17.14.1 Version: 17.14.1a Version: 17.15.1 Version: 17.15.1w Version: 17.15.1a Version: 17.15.2 Version: 17.15.1b Version: 17.15.1x Version: 17.15.1z Version: 17.15.3 Version: 17.15.2c Version: 17.15.2a Version: 17.15.1y Version: 17.15.2b Version: 17.15.3a Version: 17.15.4 Version: 17.15.3b Version: 17.15.4d Version: 17.15.4e Version: 17.16.1 Version: 17.16.1a Version: 17.17.1 Version: 17.18.1 Version: 17.18.1w Version: 17.18.1a |
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},
{
"status": "affected",
"version": "17.15.3a"
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{
"status": "affected",
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{
"status": "affected",
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{
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{
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{
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}
],
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{
"lang": "en",
"value": "The Cisco Product Security Incident Response Team (PSIRT) is aware that a public announcement is available for the vulnerability that is 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."
}
],
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{
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"attackVector": "LOCAL",
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"baseScore": 6.5,
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},
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}
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{
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{
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]
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},
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{
"name": "cisco-sa-iosxe-mntc-dos-LZweQcyq",
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}
],
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"defects": [
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],
"discovery": "EXTERNAL"
}
}
},
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"cveId": "CVE-2026-20110",
"datePublished": "2026-03-25T16:06:24.675Z",
"dateReserved": "2025-10-08T11:59:15.374Z",
"dateUpdated": "2026-03-27T15:01:27.694Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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"vulnerability-lookup:meta": {
"vulnrichment": {
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\"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco IOS XE Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"16.6.1\"}, {\"status\": \"affected\", \"version\": \"16.6.2\"}, {\"status\": \"affected\", \"version\": \"16.6.3\"}, {\"status\": \"affected\", \"version\": \"16.6.4\"}, {\"status\": \"affected\", \"version\": \"16.6.5\"}, {\"status\": \"affected\", \"version\": \"16.6.4a\"}, {\"status\": \"affected\", \"version\": \"16.6.5a\"}, {\"status\": \"affected\", \"version\": \"16.6.6\"}, {\"status\": \"affected\", \"version\": \"16.6.7\"}, {\"status\": \"affected\", \"version\": \"16.6.8\"}, {\"status\": \"affected\", \"version\": \"16.6.9\"}, {\"status\": \"affected\", \"version\": \"16.6.10\"}, {\"status\": \"affected\", \"version\": \"16.7.1\"}, {\"status\": \"affected\", \"version\": \"16.7.1a\"}, {\"status\": \"affected\", \"version\": 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\"affected\", \"version\": \"17.12.5b\"}, {\"status\": \"affected\", \"version\": \"17.12.5c\"}, {\"status\": \"affected\", \"version\": \"17.12.6a\"}, {\"status\": \"affected\", \"version\": \"17.12.5d\"}, {\"status\": \"affected\", \"version\": \"17.12.6b\"}, {\"status\": \"affected\", \"version\": \"17.13.1\"}, {\"status\": \"affected\", \"version\": \"17.13.1a\"}, {\"status\": \"affected\", \"version\": \"17.14.1\"}, {\"status\": \"affected\", \"version\": \"17.14.1a\"}, {\"status\": \"affected\", \"version\": \"17.15.1\"}, {\"status\": \"affected\", \"version\": \"17.15.1w\"}, {\"status\": \"affected\", \"version\": \"17.15.1a\"}, {\"status\": \"affected\", \"version\": \"17.15.2\"}, {\"status\": \"affected\", \"version\": \"17.15.1b\"}, {\"status\": \"affected\", \"version\": \"17.15.1x\"}, {\"status\": \"affected\", \"version\": \"17.15.1z\"}, {\"status\": \"affected\", \"version\": \"17.15.3\"}, {\"status\": \"affected\", \"version\": \"17.15.2c\"}, {\"status\": \"affected\", \"version\": \"17.15.2a\"}, {\"status\": \"affected\", \"version\": \"17.15.1y\"}, {\"status\": \"affected\", \"version\": \"17.15.2b\"}, {\"status\": \"affected\", \"version\": \"17.15.3a\"}, {\"status\": \"affected\", \"version\": \"17.15.4\"}, {\"status\": \"affected\", \"version\": \"17.15.3b\"}, {\"status\": \"affected\", \"version\": \"17.15.4d\"}, {\"status\": \"affected\", \"version\": \"17.15.4e\"}, {\"status\": \"affected\", \"version\": \"17.16.1\"}, {\"status\": \"affected\", \"version\": \"17.16.1a\"}, {\"status\": \"affected\", \"version\": \"17.17.1\"}, {\"status\": \"affected\", \"version\": \"17.18.1\"}, {\"status\": \"affected\", \"version\": \"17.18.1w\"}, {\"status\": \"affected\", \"version\": \"17.18.1a\"}]}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco Product Security Incident Response Team (PSIRT) is aware that a public announcement is available for the vulnerability that is 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.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-mntc-dos-LZweQcyq\", \"name\": \"cisco-sa-iosxe-mntc-dos-LZweQcyq\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the CLI of Cisco IOS XE Software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device.\\r\\n\\r This vulnerability exists because incorrect privileges are associated with the start maintenance command. An attacker could exploit this vulnerability by accessing the management CLI of the affected device as a low-privileged user and using the start maintenance command. A successful exploit could allow the attacker to put the device in maintenance mode, which shuts down interfaces, resulting in a denial of service (DoS) condition. In case of exploitation, a device administrator can connect to the CLI and use the stop maintenance command to restore operations.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-266\", \"description\": \"Incorrect Privilege Assignment\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-03-25T16:06:24.675Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-20110\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-27T15:01:27.694Z\", \"dateReserved\": \"2025-10-08T11:59:15.374Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-03-25T16:06:24.675Z\", \"assignerShortName\": \"cisco\"}",
"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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