Detections
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Cisco IOS XE Software DoS (cisco-sa-iosxe-mntc-dos-LZweQcyq)

medium Nessus Plugin ID 310442

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, Cisco IOS-XE Software is affected by a vulnerability.

 - 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.
 (CVE-2026-20110)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwq22014

See Also

http://www.nessus.org/u?b40d902b

http://www.nessus.org/u?f0da95d4

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq22014

Plugin Details

Severity: Medium

ID: 310442

File Name: cisco-sa-iosxe-mntc-dos-LZweQcyq-iosxe.nasl

Version: 1.1

Type: Combined

Family: CISCO

Published: 4/27/2026

Updated: 4/27/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2026-20110

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version

Patch Publication Date: 3/25/2026

Vulnerability Publication Date: 3/25/2026

Reference Information

CVE: CVE-2026-20110

CISCO-SA: cisco-sa-iosxe-mntc-dos-LZweQcyq

IAVA: 2026-A-0263

CISCO-BUG-ID: CSCwq22014