Critical 9.1

A security flaw has been discovered in TOTOLINK CA300-PoE 6.2c.884. The impacted element is the...

CVE-2026-123959 First seen on SecPulse Nov 7, 18:45

Original description The description as published by the source.

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

Source: CVE.org (CVE Program・cvelistV5) NVD GitHub Advisory

References

Key facts

CVSS v3: Critical 9.1; CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4: High 8.5; CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Published: Nov 7, 2026
First seen on SecPulse: Nov 7, 18:45
GHSA: GHSA-8359-43qx-xvjr
CWE: CWE-119 CWE-120

NVD GitHub Advisory

Tags(click for explanation)

CWE

CWE-120 CWE-119

All

Totolink Ca300 Poe

Detection sources

NIST National Vulnerability Database06:19
GitHub Security Advisories (Global)Nov 7, 21:32
CVE.org (CVE Program・cvelistV5)05:23