PT-2026-27794 · Cisco · Cisco Ios Xe

Published 2026-03-25 · Updated 2026-03-25 · CVE-2026-20110

NVD

CVSS v3.1

6.5

Medium

AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

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.

Fix

Incorrect Privilege Assignment

Weakness Enumeration

CWE-266

Related Identifiers

CVE-2026-20110

Affected Products

Cisco Ios Xe

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-20110 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-mntc-dos-LZweQcyq · Vendor Advisory
• https://reddit.com/r/pwnhub/comments/1s3q3cp/cisco_catalyst_switch_vulnerabilities_could_lead · Reddit Post