TOTOLINK A950RG MAC Filter cstecgi.cgi setMacFilterRules stack-based overflow

Summary

A flaw has been found in TOTOLINK A950RG 4.1.2cu.5268_B20221104. Affected by this vulnerability is the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component MAC Filter Handler. This manipulation of the argument addEffect causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been published 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-2026-121600
• Advisoryhttps://vuldb.com/submit/1022562
• Referencehttps://gist.github.com/H3rmesk1t/217c00b12e04fcde07c453a55579f808
• Referencehttps://vuldb.com/vuln/430442
• Referencehttps://vuldb.com/vuln/430442/cti
• Referencehttps://www.totolink.net/