CVE-2022-26414 Memory corruption in VMG3312-T20A firmware

Medium 6.0 Published 11 Apr 2022 Updated 3 Aug 2024

A local authenticated attacker can trigger a buffer overflow in Zyxel VMG3312-T20A firmware, causing a denial of service.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-26414?

CVE-2022-26414 is a medium-severity memory corruption vulnerability in Zyxel VMG3312-T20A firmware, published on 11 Apr 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A potential buffer overflow vulnerability was identified in some internal functions of Zyxel VMG3312-T20A firmware version 5.30(ABFX.5)C0, which could be exploited by a local authenticated attacker to cause a denial of service.

Weakness: CWE-120

Which versions are affected by CVE-2022-26414?

It affects 32 products.

Products include Zyxel Ax7501-B0 Firmware, Zyxel Dx5401-B0 Firmware, Zyxel Emg3525-T50b Firmware, Zyxel Emg5523-T50b Firmware, Zyxel Emg5723-T50k Firmware, Zyxel Emg6726-B10a Firmware and 26 more.

How do I fix CVE-2022-26414?

No fix has been published for CVE-2022-26414 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-2022-26414 being exploited?

There is no known exploitation of CVE-2022-26414 in the wild and no public exploit code.

Sources

Also known as GHSA-wvj8-qqh4-8vmv.