CVE-2026-20110
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 becaus
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.
Weakness: CWE-266
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco IOS XE Software | Routing & Switching | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco IOS XE Software
Vendor advisory
cisco-sa-iosxe-mntc-dos-LZweQcyq
Cisco IOS XE Software Denial of Service Vulnerability
Cisco’s rating: Medium (advisory CVSS 6.5) · Published Mar 25, 2026 · updated Apr 2, 2026 (revision 1.1)
Bug ID: CSCwq22014
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from