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CVE-2026-20110

MEDIUM
6.5
CVSS Score
Published: March 25, 2026 at 04:06 PM UTC
Updated: June 17, 2026 at 10:17 AM UTC
1 product affected across 1 vendorIOS Xe

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS Xe· Cisco
60%
16.10.116.10.1a16.10.1b16.10.1c16.10.1d16.10.1e16.10.1f16.10.1g16.10.1s16.10.216.10.316.11.116.11.1a16.11.1b16.11.1s16.11.216.12.116.12.1016.12.10a16.12.1116.12.1216.12.1316.12.1416.12.1a16.12.1c16.12.1s16.12.1t16.12.1w16.12.1x16.12.1y16.12.1z116.12.1z216.12.216.12.2a16.12.2s16.12.316.12.3a16.12.3s16.12.416.12.4a16.12.516.12.5a16.12.5b16.12.616.12.6a16.12.716.12.816.12.916.6.116.6.1016.6.216.6.316.6.416.6.4a16.6.516.6.5a16.6.616.6.716.6.816.6.916.7.116.7.1a16.7.1b16.7.216.7.316.7.416.8.116.8.1a16.8.1b16.8.1c16.8.1d16.8.1e16.8.1s16.8.216.8.316.9.116.9.1a16.9.1b16.9.1s16.9.216.9.316.9.3a16.9.416.9.516.9.5f16.9.616.9.716.9.817.1.117.1.1a17.1.1s17.1.1t17.1.317.10.117.10.1a17.10.1b17.11.117.11.1a17.12.117.12.1a17.12.1w17.12.1x17.12.1y17.12.1z17.12.1z117.12.1z217.12.1z317.12.1z417.12.217.12.2a17.12.317.12.3a17.12.417.12.4a17.12.4b17.12.517.12.5a17.12.5b17.12.5c17.12.5d17.12.617.12.6a17.12.6b17.13.117.13.1a17.14.117.14.1a17.15.117.15.1a17.15.1b17.15.1w17.15.1x17.15.1y17.15.1z17.15.217.15.2a17.15.2b17.15.2c17.15.317.15.3a17.15.3b17.15.417.15.4d17.15.4e17.16.117.16.1a17.17.117.18.117.18.1a17.18.1w17.2.117.2.1a17.2.1r17.2.1v17.2.217.2.317.3.117.3.1a17.3.1w17.3.1x17.3.1z17.3.217.3.2a17.3.317.3.417.3.4a17.3.4b17.3.4c17.3.517.3.5a17.3.5b17.3.617.3.717.3.817.3.8a17.4.117.4.1a17.4.1b17.4.217.4.2a17.5.117.5.1a17.6.117.6.1a17.6.1w17.6.1x17.6.1y17.6.1z17.6.1z117.6.217.6.317.6.3a17.6.417.6.517.6.5a17.6.617.6.6a17.6.717.6.817.6.8a17.7.117.7.1a17.7.1b17.7.217.8.117.8.1a17.9.117.9.1a17.9.1w17.9.1x17.9.1x117.9.1y17.9.1y117.9.217.9.2a17.9.317.9.3a17.9.417.9.4a17.9.517.9.5a17.9.5b17.9.5e17.9.5f17.9.617.9.6a17.9.717.9.7a17.9.7b17.9.8

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-mntc-dos-LZweQcyq

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMcisco
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-266

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