CVE-2026-20484 Information disclosure in MediaTek chipset

Medium 4.4 Published 3 Aug 2026 Updated 3 Aug 2026

A missing permission check in MediaTek chipsets allows local attackers with System privileges to disclose sensitive information.

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-2026-20484?

CVE-2026-20484 is a medium-severity vulnerability in MediaTek, Inc. MediaTek chipset, published on 3 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In TFA, there is a possible information disclosure due to a missing permission check. This could lead to local information disclosure if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11053160; Issue ID: MSV-8004.

Weakness: CWE-201

Which versions are affected by CVE-2026-20484?

It affects 39 products.

Products include Mediatek Mt6739 Firmware, Mediatek Mt6761 Firmware, Mediatek Mt6765 Firmware, Mediatek Mt6768 Firmware, Mediatek Mt6781 Firmware, Mediatek Mt6789 Firmware and 33 more.

How do I fix CVE-2026-20484?

No fix has been published for CVE-2026-20484 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-20484 being exploited?

There is no known exploitation of CVE-2026-20484 in the wild and no public exploit code.

Sources

Also known as GHSA-mhh4-4rgh-x32m.