TOTOLINK CA300-PoE cstecgi.cgi setWiFiRepeaterConfig buffer overflow

Summary

A weakness has been identified in TOTOLINK CA300-PoE 6.2c.884. Affected is the function setWiFiRepeaterConfig of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument ApCliKeyStr can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could 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-2026-124058
• Advisoryhttps://vuldb.com/submit/1033755
• Referencehttps://lavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setWiFiRepeaterConfig-3f953a41781f80349879d9aca7c4702a?source=copy_link
• Referencehttps://vuldb.com/vuln/432113
• Referencehttps://vuldb.com/vuln/432113/cti
• Referencehttps://www.totolink.net/