CVE-2026-20533 Integer overflow in MediaTek chipset

Medium 6.7 Published 5 Oct 2026 Updated 6 Oct 2026

A local attacker with System privileges can exploit an integer overflow in the display component to escalate privileges further.

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-2026-20533?

CVE-2026-20533 is a medium-severity 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 display, there is a possible escalation of privilege due to an integer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11296678; Issue ID: MSV-9167.

Weakness: CWE-190

Which versions are affected by CVE-2026-20533?

It affects 33 products.

Products include Mediatek Mt6739 Firmware, Mediatek Mt6761 Firmware, Mediatek Mt6765 Firmware, Mediatek Mt6768 Firmware, Mediatek Mt6781 Firmware, Mediatek Mt6789 Firmware and 27 more.

How do I fix CVE-2026-20533?

No fix has been published for CVE-2026-20533 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-20533 being exploited?

There is no known exploitation of CVE-2026-20533 in the wild and no public exploit code.

Sources

Also known as GHSA-g76f-499r-45cc.