CVE-2023-45852: Viessmann Vitogate 300 Firmware

Critical severity, CVSS 9.8. EPSS: 14% chance of exploitation in the next 30 days.

In Vitogate 300 2.1.3.0, /cgi-bin/vitogate.cgi allows an unauthenticated attacker to bypass authentication and execute arbitrary commands via shell metacharacters in the ipaddr params JSON data for the put method.

Affected products

• Viessmann Vitogate 300 Firmware: up to and including 2.1.3.0

Published 2023-10-14. Last modified 2026-06-17.