What’s Vulnerable › Vulnerabilities

CVE-2022-43970: Buffer overflow in Linksys WRT54GL

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 19.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-01-09 · updated 2026-06-17
• Weakness: CWE-120

Description

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 Wireless-G Broadband Router: through 4.30.18.006

References

• https://youtu.be/73-1lhvJPNg
• https://youtu.be/RfWVYCUBNZ0
• https://youtu.be/TeWAmZaKQ_w
• https://youtu.be/73-1lhvJPNg
• https://youtu.be/RfWVYCUBNZ0
• https://youtu.be/TeWAmZaKQ_w

Get alerted when CVE-2022-43970 or the next vulnerability affects your stack