CVE-2022-43970: Linksys WRT54GL Firmware

High severity, CVSS 7.2. EPSS: 19.3% chance of exploitation in the next 30 days.

A buffer overflow vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A stack-based buffer overflow in the Start_EPI function within the httpd binary allows an authenticated attacker with administrator privileges to execute arbitrary commands on the underlying Linux operating system as root. This vulnerablity can be triggered over the network via a malicious POST request to /apply.cgi.

Affected products

• Linksys WRT54GL Firmware: up to and including 4.30.18.006

Published 2023-01-09. Last modified 2026-06-17.