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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

No data.

No data.

No data.

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Vendors Products
References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-mntc-dos-LZweQcyq cve-icon cve-icon
History

Wed, 25 Mar 2026 22:00:00 +0000

Type Values Removed Values Added
Title Authenticated Local Attacker Can Force Cisco IOS XE Into Maintenance Mode, Causing Denial of Service

Wed, 25 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-266
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H'}
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-03-25T16:06:24.675Z

Reserved: 2025-10-08T11:59:15.374Z

Link: CVE-2026-20110

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-25T16:16:14.630

Modified: 2026-03-25T16:16:14.630

Link: CVE-2026-20110

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-25T21:30:52Z