CVE-2026-44089
Deferred Deferred - Pending Action
Buffer Overflow in Totolink EX1200L Router

Publication date: 2026-06-23

Last updated on: 2026-06-23

Assigner: CERT.PL

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.
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Meta Information
Published
2026-06-23
Last Modified
2026-06-23
Generated
2026-06-23
AI Q&A
2026-06-23
EPSS Evaluated
N/A
NVD
CVE-2026-44089
EUVD
EUVD-2026-38425
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
totolink ex1200l From 9.3.5u.6146_b20201023 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Executive Summary

CVE-2026-44089 is a stack-based buffer overflow vulnerability found in the Totolink EX1200L router software, specifically in the login functionality of the cgi-bin/cstecgi.cgi endpoint.

This flaw allows an unauthenticated attacker to remotely crash the program and execute arbitrary code with root privileges.

Exploitation of this vulnerability can lead to unauthorized access to data, modification of data, or even permanently damaging (bricking) the router.

Impact Analysis

This vulnerability can have severe impacts including unauthorized remote code execution with root privileges on the affected router.

  • Attackers can crash the router's login program, causing denial of service.
  • Attackers can read and modify sensitive data stored on the router.
  • The router can be permanently damaged or bricked, resulting in loss of network connectivity.
Compliance Impact

The vulnerability allows an attacker to execute code remotely with root privileges, enabling unauthorized reading and editing of data on the affected router.

Such unauthorized access and potential data manipulation could lead to non-compliance with data protection regulations like GDPR and HIPAA, which require safeguarding sensitive data against unauthorized access and ensuring system integrity.

Therefore, exploitation of this vulnerability could compromise the confidentiality, integrity, and availability of data, impacting compliance with these common standards and regulations.

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