TOTOLINK CA300-PoE cstecgi.cgi setWiFiMultipleConfig buffer overflow

Summary

A security flaw has been discovered in TOTOLINK CA300-PoE 6.2c.884. This impacts the function setWiFiMultipleConfig of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument Key1Str1 results in buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.

Remediation

1. Inventory every TOTOLINK CA300-PoE 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-2026-124057
• Advisoryhttps://vuldb.com/submit/1033754
• Referencehttps://vuldb.com/vuln/432112
• Referencehttps://vuldb.com/vuln/432112/cti
• Referencehttps://lavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setWiFiMultipleConfig-3f953a41781f800fab65eaa6a2887fa1?source=copy_link
• Referencehttps://www.totolink.net/