CVE-2026-44089 Buffer Overflow in Totolink EX1200L router
A buffer overflow in the login endpoint allows remote attackers to execute code with root privileges, potentially bricking the device.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44089?
CVE-2026-44089 is a critical memory corruption vulnerability in Totolink EX1200L, published on 23 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-121
Which versions are affected by CVE-2026-44089?
How do I fix CVE-2026-44089?
No fix has been published for CVE-2026-44089 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-44089 being exploited?
There is no known exploitation of CVE-2026-44089 in the wild and no public exploit code.
Sources
Also known as GHSA-7mjx-95cj-9wpm.