TOTOLINK A950RG Basic Wireless Configuration cstecgi.cgi strcpy stack-based overflow

Summary

A security vulnerability has been detected in TOTOLINK A950RG 4.1.2cu.5268_B20221104. This impacts the function strcpy of the file /cgi-bin/cstecgi.cgi of the component Basic Wireless Configuration Handler. The manipulation of the argument wepkey leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

Remediation

1. Inventory every TOTOLINK A950RG deployment, including staging.
2. No fixed version appears in the public sources yet. Check the references below and the vendor directly.

References

• Advisoryhttps://vuldb.com/cve/CVE-2026-121598
• Advisoryhttps://vuldb.com/submit/1022559
• Referencehttps://gist.github.com/H3rmesk1t/e283a4f3224cbd0a57d4392de60bd2c6
• Referencehttps://vuldb.com/vuln/430440
• Referencehttps://vuldb.com/vuln/430440/cti
• Referencehttps://www.totolink.net/