CVE-2026-123961: TOTOLINK CA300-PoE cstecgi.cgi setWiFiBasicConfig buffer overflow
A security vulnerability has been detected in TOTOLINK CA300-PoE 6.2c.884. This impacts the function setWiFiBasicConfig of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument KeyStr leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The attack may be initiated remotely. The provided information does not state that authentication, local network access, or any other prerequisite is required.
Which systems are known to be affected?
The affected product and version identified in the available information are TOTOLINK CA300-PoE 6.2c.884. The flaw is in the setWiFiBasicConfig function of /cgi-bin/cstecgi.cgi and is triggered through the KeyStr argument.
How urgent is mitigation?
A public exploit has been disclosed and may be used. Systems running the identified affected version should be treated as exposed to attempted remote exploitation until a remediation is available or access to the vulnerable CGI endpoint is restricted.