CVE-2025-20637 Denial of service in MT7981, MT7986
Remote attackers can cause a system hang in MediaTek network hardware via an uncaught exception, resulting in denial of service 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-2025-20637?
CVE-2025-20637 is a high-severity denial of service vulnerability in Mediatek Software Development Kit, published on 3 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In network HW, there is a possible system hang due to an uncaught exception. This could lead to remote denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00399035; Issue ID: MSV-2380.
Which versions are affected by CVE-2025-20637?
It affects 1 product.
Products include Mediatek Software Development Kit.
How do I fix CVE-2025-20637?
No fix has been published for CVE-2025-20637 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-20637 being exploited?
There is no known exploitation of CVE-2025-20637 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-qwc4-4mwx-cwrr.