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.

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.

The EPSS score is 0.00016.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

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

No data.

No data.

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Vendors Products
Cisco Subscribe
Ios Xe Software Subscribe

Project Subscriptions

Vendors Products
Cisco Subscribe
Ios Xe Software Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Thu, 26 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco ios Xe Software
Vendors & Products Cisco
Cisco ios Xe Software

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'}

Projects

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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 : Awaiting Analysis

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

Modified: 2026-03-26T15:13:15.790

Link: CVE-2026-20110

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-26T11:42:44Z

Weaknesses