CVE-2026-20544 Memory corruption in MediaTek chipset

Medium 6.8 Published 5 Oct 2026 Updated 5 Oct 2026

A missing bounds check in MediaTek chipset firmware allows local attackers with physical access to escalate privileges via out-of-bounds write.

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-2026-20544?

CVE-2026-20544 is a medium-severity memory corruption vulnerability in MediaTek, Inc. MediaTek chipset, published on 5 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In meta, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11049530 / ALPS11480843; Issue ID: MSV-7935.

Weakness: CWE-787

Which versions are affected by CVE-2026-20544?

It affects 59 products.

Products include Mediatek Mt6739 Firmware, Mediatek Mt6761 Firmware, Mediatek Mt6765 Firmware, Mediatek Mt6768 Firmware, Mediatek Mt6769 Firmware, Mediatek Mt6781 Firmware and 53 more.

How do I fix CVE-2026-20544?

No fix has been published for CVE-2026-20544 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-2026-20544 being exploited?

There is no known exploitation of CVE-2026-20544 in the wild and no public exploit code.

Sources

Also known as GHSA-wx8c-gfpx-8wcw.