TOTOLINK CA300-PoE: Buffer overflow in setWiFiRepeaterConfig (CVE-2026-124058)
A buffer overflow vulnerability exists in the setWiFiRepeaterConfig function of the /cgi-bin/cstecgi.cgi file in TOTOLINK CA300-PoE 6.2c.884, which can be triggered remotely by manipulating the ApCliKeyStr argument. Public exploit code is available.
CVE search metadata
CVE search record: CVE-2026-124058. Severity: critical. CVSS: 9.1. KEV: no. Product: CA300-PoE (6.2c.884). Brief: TOTOLINK CA300-PoE: Buffer overflow in setWiFiRepeaterConfig (CVE-2026-124058). Brief link: https://feed.craftedsignal.io/briefs/2026-11-07-totolink-buffer-overflow/
Triage facts
Revision 1- Applicability
- CA300-PoE (6.2c.884)
- Evidence
- Unknown
- Severity
- Critical
- Sources
- 1 public source
- Freshness
- Revision 1Nov 7, 22:45 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
A weakness has been identified in TOTOLINK CA300-PoE version 6.2c.884. The function setWiFiRepeaterConfig within /cgi-bin/cstecgi.cgi is affected. Manipulating the ApCliKeyStr argument can lead to a buffer overflow. The attack can be launched remotely, and the exploit has been made available to the public.