A vulnerability was found in Linksys WRT54G 4.21.5. It has been rated as critical. Affected by this issue is the function validateservicesport of the file /apply.cgi of the component POST Parameter Handler. The manipulation of the argument servicesarray leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Linksys WRT54G v4.21.5 has a stack overflow vulnerability in getmergemac function.