The vulnerability of the sub_40139C() function in the /cgi-bin/firewall.cgi script of the Wavlink WL-WN579X3-C router’s microprogramming system, which allows a perpetrator to compromise the confidentiality, integrity, and accessibility of protected information.

The vulnerability of the sub40139C function in the /cgi-bin/firewall.cgi script of the Wavlink WL-WN579X3-C router’s microprogramming system is related to buffer overflow in the stack. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and...

PT-2026-23923

Name of the Vulnerable Software and Affected Versions Wavlink WL-WN579X3-C versions prior to 20260226 Description A stack-based buffer overflow exists in the function sub 40139C of the file /cgi-bin/firewall.cgi. Manipulation of the del flag argument can trigger this issue, allowing for remote...