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CVE-2026-20110

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CVE-2026-20110

Published: Mar 25, 2026

Modified: Mar 27, 2026

PUBLISHED

CVSS v3.1

6.5

MEDIUM

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.

VendorProductVersions

Cisco

Cisco IOS XE Software

affected
16.6.1
affected
16.6.2
affected
16.6.3
affected
16.6.4
affected
16.6.5

+225 more versions

Weaknesses (CWE)

CWE-266

CVSS v3.1 Details

CVSS v3.1 Vector

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

References

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