CVE-2025-50398 Memory corruption in n/a

Critical 9.8 Published 16 Dec 2025 Updated 17 Dec 2025

A buffer overflow in the Mercury D196G router allows attackers to execute arbitrary code via the fac_password parameter.

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-2025-50398?

CVE-2025-50398 is a critical memory corruption vulnerability in n/a, published on 16 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Mercury D196G d196gv1-cn-up_2020-01-09_11.21.44 is vulnerable to Buffer Overflow in the function sub_404CAEDC via the parameter fac_password.

Weakness: CWE-120

Which versions are affected by CVE-2025-50398?

It affects 1 product.

Products include Mercurycom D196g Firmware.

How do I fix CVE-2025-50398?

No fix has been published for CVE-2025-50398 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-2025-50398 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-50398 exists.

CVE-2025-50401 Memory corruption in n/a Critical 9.8

Sources

Also known as GHSA-cwxx-x5xj-gp76.