CVE-2025-20646 Memory corruption in MT6890, MT7915, MT7916, MT7981, MT7986
Remote attackers can escalate privileges via out-of-bounds write in MediaTek Wi-Fi AP firmware 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-2025-20646?
CVE-2025-20646 is a critical memory corruption vulnerability in Mediatek Software Development Kit, published on 3 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In wlan AP FW, there is a possible out of bounds write due to improper input validation. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00389074; Issue ID: MSV-1803.
Weakness: CWE-787
Which versions are affected by CVE-2025-20646?
It affects 1 product.
Products include Mediatek Software Development Kit.
How do I fix CVE-2025-20646?
No fix has been published for CVE-2025-20646 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-2025-20646 being exploited?
There is no known exploitation of CVE-2025-20646 in the wild and no public exploit code.
Other vulnerabilities in Mediatek Software Development Kit
- CVE-2025-20681 Memory corruption in MT6890, MT7615, MT7622, MT7663, MT7915
- CVE-2025-20682 Memory corruption in MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986
- CVE-2025-20683 Memory corruption in MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986
- CVE-2025-20684 Memory corruption in MT7615, MT7622, MT7663
- CVE-2025-20674 Missing authorization in MT6890, MT6990, MT7915, MT7916, MT7981, MT7986, MT7990, MT7992, MT7993
Sources
Also known as GHSA-3j27-47wq-ghmh.