CVE-2026-20110

The record

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 packages

Related vulnerabilities

• CVE-2026-63349 AnyIO is a high level asynchronous concurrency and networking framework that works on top… CWE-266
• CVE-2026-62106 Subscriber Privilege Escalation in SMS Alert Order Notifications <= 3.9.9 versions. CWE-266
• CVE-2026-62102 Subscriber Privilege Escalation in Gato GraphQL <= 19.2.3 versions. CWE-266
• CVE-2026-8303 Incorrect privilege assignment vulnerability in TUBITAK BILGEM Software Technologies… CWE-266
• CVE-2026-81805 Unauthenticated Privilege Escalation in SiteSkite <= 2.1.5 versions. CWE-266
• CVE-2026-15140 A privilege-escalation issue in the Portworx Operator when deployed on Red Hat OpenShift… CWE-266
• CVE-2026-86804 A vulnerability was identified in seakee CPA-Manager-Plus up to 1.11.10. CWE-266
• CVE-2026-77654 Improper Privilege Management vulnerability in Horizon Security Analyzer (formerly… CWE-266