CVE-2025-20683 Memory corruption in MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986

Critical 9.8 Published 8 Jul 2025 Updated 8 Jul 2025

A local attacker can exploit an out-of-bounds write in the MediaTek Wi-Fi AP driver to escalate privileges without user interaction.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-20683?

CVE-2025-20683 is a critical memory corruption vulnerability in Mediatek Software Development Kit, published on 8 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00416938; Issue ID: MSV-3444.

Weakness: CWE-787

Which versions are affected by CVE-2025-20683?

It affects 2 products.

Products include Mediatek Software Development Kit, Openwrt Openwrt.

How do I fix CVE-2025-20683?

No fix has been published for CVE-2025-20683 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-2025-20683 being exploited?

There is no known exploitation of CVE-2025-20683 in the wild and no public exploit code.

All Mediatek Software Development Kit vulnerabilities

Sources

Also known as GHSA-j32p-q9pr-58cg.