critical
advisory
TOTOLINK CA300-PoE: Buffer overflow vulnerability (CVE-2026-123958)
A buffer overflow vulnerability was identified in the setLanConfig function of TOTOLINK CA300-PoE 6.2c.884.
CVE search metadata
CVE search record: CVE-2026-123958. Severity: critical. CVSS: 9.9. KEV: no. Product: CA300-PoE (6.2c.884). Brief: TOTOLINK CA300-PoE: Buffer overflow vulnerability (CVE-2026-123958). Brief link: https://feed.craftedsignal.io/briefs/2026-11-totolink-buffer-overflow-ef78ab51/
Triage facts
Revision 1- Applicability
- CA300-PoE (6.2c.884)
- Evidence
- Unknown
- Severity
- Critical
- Sources
- 1 public source
- Freshness
- Revision 1Nov 7, 09:58 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
A buffer overflow vulnerability (CVE-2026-123958) was identified in the setLanConfig function of the /cgi-bin/cstecgi.cgi file in TOTOLINK CA300-PoE version 6.2c.884. Manipulation of the lanDns, lanSecDns, or langType arguments leads to a buffer overflow. The attack can be launched remotely, and the exploit is publicly available.