by Kastro
Paper/Archive/CVE-2026-123959

CVE-2026-123959

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

EPSS 0.8%CVSS 9.4
critical.is priorityof 100
40
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 58.1.581 × 2011.6No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

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

Scores by source

VulDB (CNA)9.4CVSS: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
VulDB (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
VulDB (CNA)9.1CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C

References

writeupvuldb.com/vuln/432022refvuldb.com/vuln/432022/ctiwriteupvuldb.com/cve/CVE-2026-123959writeupvuldb.com/submit/1033721exploitlavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setLanguageCfg-3f953a41781f80199f44f227136a1441?source=copy_linkreftotolink.net