CVE-2023-20273: Cisco IOS XE Web UI Command Injection Vulnerability

High severity, CVSS 7.2. Actively exploited: in CISA KEV since 2023-10-23. EPSS: 89.6% chance of exploitation in the next 30 days.

A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker to inject commands with the privileges of root. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web UI. A successful exploit could allow the attacker to inject commands to the underlying operating system with root privileges.

Affected products

• Cisco IOS XE: version 16.1.1 only; version 16.1.2 only; version 16.1.3 only; version 16.2.1 only; version 16.2.2 only; version 16.3.1a only; …

Published 2023-10-25. Last modified 2026-06-17.