PT-2026-51497 · Totolink · Ex1200L

Franciszek Malek · Published 2026-06-23 · Updated 2026-06-23 · CVE-2026-44089

NVD

CVSS v4.0

9.4

Critical

Base vector

AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2026-44089

Affected Products

Ex1200L

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-44089 · Security Note
• https://cert.pl/en/posts/2026/06/CVE-2026-44089 · Note
• https://totolink.net/home/menu/detail/menu_listtpl/download/id/217/ids/36.html · Note