CVE-2025-14964 TOTOLINK T10 cstecgi.cgi sprintf stack-based overflow

Critical 9.3 Published 19 Dec 2025 Updated 24 Feb 2026

Remote attackers can trigger a stack-based buffer overflow in the TOTOLINK T10 router via the loginAuthUrl parameter, potentially leading to code execution or service disruption.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-14964?

CVE-2025-14964 is a critical memory corruption vulnerability in TOTOLINK T10, published on 19 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability has been found in TOTOLINK T10 4.1.8cu.5083_B20200521. This affects the function sprintf of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument loginAuthUrl leads to stack-based buffer overflow. The attack may be performed from remote.

Weakness: CWE-121, CWE-119

Which versions are affected by CVE-2025-14964?

It affects 1 product.

Products include Totolink T10 Firmware.

How do I fix CVE-2025-14964?

No fix has been published for CVE-2025-14964 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-2025-14964 being exploited?

There is no known exploitation of CVE-2025-14964 in the wild and no public exploit code.

Sources

Also known as GHSA-4jvq-53ch-ccmg.