CVE-2026-44089

Buffer Overflow in Totolink EX1200L router

State: Published
Severity: 9.4 Critical
Published: Jun 23, 2026
Updated: Jun 23, 2026
Reserved: May 5, 2026

Description

Totolink EX1200L router is vulnerable to Buffer Overflow in the login functionality in cgi-bin/cstecgi.cgi endpoint. This vulnerability could be exploited to cause the program to crash and to execute code remotely. This allows the attacker to perform actions as root including reading and editing data, as well as bricking the router.

Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 9.3.5u.6146_B20201023 but may also affect other versions.

Scores

CVSS	Score	Vector	Source
4.0	9.4 Critical	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	CERT-PL

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
EX1200LTotolink	9.3.5u.6146_B20201023Affected

References

https://cert.pl/en/posts/2026/06/CVE-2026-44089third-party-advisory
https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/217/ids/36.htmlproduct

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