CVE-2026-20452 Memory corruption in MediaTek chipset

High 8.0 Published 1 Jun 2026 Updated 2 Jun 2026

A heap buffer overflow in the MediaTek WLAN AP driver allows remote code execution for attackers with user privileges.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-20452?

CVE-2026-20452 is a high-severity memory corruption vulnerability in MediaTek, Inc. MediaTek chipset, published on 1 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In wlan AP driver, there is a possible memory corruption due to a heap buffer overflow. This could lead to remote (proximal/adjacent) code execution with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00480138; Issue ID: MSV-6295.

Weakness: CWE-122

Which versions are affected by CVE-2026-20452?

It affects 9 products.

Products include Mediatek Mt6890 Firmware, Mediatek Mt7615 Firmware, Mediatek Mt7915 Firmware, Mediatek Mt7916 Firmware, Mediatek Mt7981 Firmware, Mediatek Mt7986 Firmware and 3 more.

How do I fix CVE-2026-20452?

No fix has been published for CVE-2026-20452 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-2026-20452 being exploited?

There is no known exploitation of CVE-2026-20452 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Sources

Also known as GHSA-mfvp-3qw7-v5gw.