CVE-2026-20482 Denial of service in MediaTek chipset
A remote attacker can cause a MediaTek chipset to become unresponsive via excessive logging in the WLAN STA firmware, resulting in denial of service.
- 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-2026-20482?
CVE-2026-20482 is a medium-severity denial of service 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 wlan STA FW, there is a possible system becoming unresponsive due to logging. This could lead to remote (proximal/adjacent) denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00486814; Issue ID: MSV-6824.
Weakness: CWE-770
Which versions are affected by CVE-2026-20482?
It affects 5 products.
Products include Mediatek Mt7902 Firmware, Mediatek Mt7921 Firmware, Mediatek Mt7922 Firmware, Mediatek Mt8518s Firmware, Mediatek Mt8532 Firmware.
How do I fix CVE-2026-20482?
No fix has been published for CVE-2026-20482 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-2026-20482 being exploited?
There is no known exploitation of CVE-2026-20482 in the wild and no public exploit code.
Other vulnerabilities in MediaTek, Inc. MediaTek chipset
- CVE-2025-20672 Memory corruption in MT7902, MT7921, MT7922, MT7925, MT7927
- CVE-2026-20495 Missing authorization in MediaTek chipset
- CVE-2026-20456 Memory corruption in MediaTek chipset
- CVE-2025-20673 Null dereference in MT7902, MT7921, MT7922, MT7925, MT7927
- CVE-2025-20675 Null dereference in MT7902, MT7921, MT7922, MT7925, MT7927
Sources
Also known as GHSA-gm27-7f5g-4rrp.