CVE-2026-44089 | Totolink EX1200L router is vulnerable to Buffer Overflow in … | CVSS 9.4 CRITICAL

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.

Metadata

CVE ID: CVE-2026-44089
State: PUBLISHED
Assigner: CERT-PL
Reserved: 2026-05-05 09:40 UTC
Published: 2026-06-23 12:08 UTC
Last updated: 2026-06-23 13:32 UTC
Primary CWE: CWE-121
CWE-121 Stack-based Buffer Overflow
Vendor / Product: Totolink / EX1200L
Sources: cve.org · NVD

Severity & Metrics

9.4 CRITICAL CVSS 4.0

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Totolink	EX1200L	—	9.3.5u.6146_B20201023

Weakness (CWE)

CWE	Source	Description
CWE-121	cna	CWE-121 Stack-based Buffer Overflow

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.4	CRITICAL	4.0	cna	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

References (2)