Denial of Service Vulnerability in Cisco IOS XE Software Management CLI

CVE-2026-20110

What is CVE-2026-20110?

A vulnerability in the Cisco IOS XE Software's command-line interface (CLI) allows an authenticated, local attacker to induce a denial of service condition on the device. This issue arises from misconfigured privileges tied to the 'start maintenance' command. Attackers with low-level access can leverage the CLI to execute this command, placing the device into maintenance mode and disabling interfaces. This can lead to a significant disruption in services. To recover from this state, device administrators must connect to the CLI and utilize the 'stop maintenance' command to restore normal operations.

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References