CVE-2026-20483 Missing authorization in MediaTek chipset

High 7.7 Published 3 Aug 2026 Updated 5 Aug 2026

Local attackers can escalate privileges in MediaTek chipsets due to a missing permission check in the Telephony component.

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-2026-20483?

CVE-2026-20483 is a high-severity missing authorization 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 Telephony, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11087526; Issue ID: MSV-8243.

Weakness: CWE-862

Which versions are affected by CVE-2026-20483?

It affects 35 products.

Products include Mediatek Mt6739 Firmware, Mediatek Mt6761 Firmware, Mediatek Mt6765 Firmware, Mediatek Mt6768 Firmware, Mediatek Mt6781 Firmware, Mediatek Mt6789 Firmware and 29 more.

How do I fix CVE-2026-20483?

No fix has been published for CVE-2026-20483 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-20483 being exploited?

There is no known exploitation of CVE-2026-20483 in the wild and no public exploit code.

Sources

Also known as GHSA-gp8p-m3ww-5f47.