by Kastro
Paper/Archive/CVE-2026-123960

CVE-2026-123960

TOTOLINK CA300-PoE — TOTOLINK CA300-PoE cstecgi.cgi setWanConfig buffer overflow

EPSS 0.8%CVSS 9.9
critical.is priorityof 100
41
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 56.7.567 × 2011.3No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

A weakness has been identified in TOTOLINK CA300-PoE 6.2c.884. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument pppoeUser/priDns/secDns 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.

Affected

ProductAffectedFixed inSource
CA300-PoE6.2c.884–CNA

Scores by source

VulDB (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
VulDB (CNA)9.9CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
VulDB (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

References

writeupvuldb.com/vuln/432023refvuldb.com/vuln/432023/ctiwriteupvuldb.com/cve/CVE-2026-123960writeupvuldb.com/submit/1033722exploitlavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setWanConfig-3f953a41781f80ec86f3c2840cb5fc4b?source=copy_linkreftotolink.net