CVE-2025-20691 Information disclosure in MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986

Medium 5.5 Published 8 Jul 2025 Updated 8 Jul 2025

A local attacker can read out-of-bounds memory in the MediaTek Wi-Fi AP driver, leading to information disclosure without user interaction.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-20691?

CVE-2025-20691 is a medium-severity vulnerability in Mediatek Software Development Kit, published on 8 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In wlan AP driver, there is a possible out of bounds read due to an incorrect bounds check. This could lead to local information disclosure with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00418039; Issue ID: MSV-3477.

Weakness: CWE-125

Which versions are affected by CVE-2025-20691?

It affects 2 products.

Products include Mediatek Software Development Kit, Openwrt Openwrt.

How do I fix CVE-2025-20691?

No fix has been published for CVE-2025-20691 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-20691 being exploited?

There is no known exploitation of CVE-2025-20691 in the wild and no public exploit code.

All Mediatek Software Development Kit vulnerabilities

Sources

Also known as GHSA-7c39-9v6m-39rf.