🔐 CVE Alert

CVE-2026-20110

MEDIUM 6.5
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
4th

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.

CWE CWE-266
Vendor cisco
Product cisco ios xe software
Ecosystems
Industries
NetworkingTelecommunications
Published Mar 25, 2026
Last Updated Mar 27, 2026
Stay Ahead of the Next One

Get instant alerts for cisco cisco ios xe software

Be the first to know when new medium vulnerabilities affecting cisco cisco ios xe software are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

Affected Versions

Cisco / Cisco IOS XE Software
16.6.1 16.6.2 16.6.3 16.6.4 16.6.5 16.6.4a 16.6.5a 16.6.6 16.6.7 16.6.8 16.6.9 16.6.10 16.7.1 16.7.1a 16.7.1b 16.7.2 16.7.3 16.7.4 16.8.1 16.8.1a 16.8.1b 16.8.1s 16.8.1c 16.8.1d 16.8.2 16.8.1e 16.8.3 16.9.1 16.9.2 16.9.1a 16.9.1b 16.9.1s 16.9.3 16.9.4 16.9.3a 16.9.5 16.9.5f 16.9.6 16.9.7 16.9.8 16.10.1 16.10.1a 16.10.1b 16.10.1s 16.10.1c 16.10.1e 16.10.1d 16.10.2 16.10.1f 16.10.1g 16.10.3 16.11.1 16.11.1a 16.11.1b 16.11.2 16.11.1s 16.12.1 16.12.1s 16.12.1a 16.12.1c 16.12.1w 16.12.2 16.12.1y 16.12.2a 16.12.3 16.12.8 16.12.2s 16.12.1x 16.12.1t 16.12.4 16.12.3s 16.12.3a 16.12.4a 16.12.5 16.12.6 16.12.1z1 16.12.5a 16.12.5b 16.12.1z2 16.12.6a 16.12.7 16.12.9 16.12.10 16.12.10a 16.12.11 16.12.12 16.12.13 16.12.14 17.1.1 17.1.1a 17.1.1s 17.1.1t 17.1.3 17.2.1 17.2.1r 17.2.1a 17.2.1v 17.2.2 17.2.3 17.3.1 17.3.2 17.3.3 17.3.1a 17.3.1w 17.3.2a 17.3.1x 17.3.1z 17.3.4 17.3.5 17.3.4a 17.3.6 17.3.4b 17.3.4c 17.3.5a 17.3.5b 17.3.7 17.3.8 17.3.8a 17.4.1 17.4.2 17.4.1a 17.4.1b 17.4.2a 17.5.1 17.5.1a 17.6.1 17.6.2 17.6.1w 17.6.1a 17.6.1x 17.6.3 17.6.1y 17.6.1z 17.6.3a 17.6.4 17.6.1z1 17.6.5 17.6.6 17.6.6a 17.6.5a 17.6.7 17.6.8 17.6.8a 17.7.1 17.7.1a 17.7.1b 17.7.2 17.10.1 17.10.1a 17.10.1b 17.8.1 17.8.1a 17.9.1 17.9.1w 17.9.2 17.9.1a 17.9.1x 17.9.1y 17.9.3 17.9.2a 17.9.1x1 17.9.3a 17.9.4 17.9.1y1 17.9.5 17.9.4a 17.9.5a 17.9.5b 17.9.6 17.9.6a 17.9.7 17.9.5e 17.9.5f 17.9.8 17.9.7a 17.9.7b 17.11.1 17.11.1a 17.12.1 17.12.1w 17.12.1a 17.12.1x 17.12.2 17.12.3 17.12.2a 17.12.1y 17.12.1z 17.12.4 17.12.3a 17.12.1z1 17.12.1z2 17.12.4a 17.12.5 17.12.4b 17.12.1z3 17.12.5a 17.12.1z4 17.12.6 17.12.5b 17.12.5c 17.12.6a 17.12.5d 17.12.6b 17.13.1 17.13.1a 17.14.1 17.14.1a 17.15.1 17.15.1w 17.15.1a 17.15.2 17.15.1b 17.15.1x 17.15.1z 17.15.3 17.15.2c 17.15.2a 17.15.1y 17.15.2b 17.15.3a 17.15.4 17.15.3b 17.15.4d 17.15.4e 17.16.1 17.16.1a 17.17.1 17.18.1 17.18.1w 17.18.1a

References

NVD ↗ CVE.org ↗ EPSS Data ↗
sec.cloudapps.cisco.com: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-mntc-dos-LZweQcyq