CVE-2026-121599

Critical CVSS 9.9

Published 2026-11-04 · last changed 2026-11-04

The fix

We hold no Microsoft remediation data for CVE-2026-121599, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

A vulnerability was detected in TOTOLINK A950RG 4.1.2cu.5268_B20221104. Affected is the function setWiFiMultipleConfig/delWiFiMultipleConfig of the file /cgi-bin/cstecgi.cgi of the component Multi-SSID Configuration. The manipulation of the argument wepkey2/wepkey3 results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used.

Sources

NVD record for CVE-2026-121599

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H