CVE-2026-20495 Missing authorization in MediaTek chipset
A missing permission check in the MediaTek Bluetooth driver allows local attackers to escalate privileges 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-2026-20495?
CVE-2026-20495 is a high-severity missing authorization 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 Bluetooth driver, there is a possible permission bypass due to a missing permission check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00488300; Issue ID: MSV-7296.
Weakness: CWE-862
Which versions are affected by CVE-2026-20495?
It affects 6 products.
Products include Mediatek Mt7902 Firmware, Mediatek Mt7920 Firmware, Mediatek Mt7921 Firmware, Mediatek Mt7922 Firmware, Mediatek Mt7925 Firmware, Mediatek Mt7927 Firmware.
How do I fix CVE-2026-20495?
No fix has been published for CVE-2026-20495 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-20495 being exploited?
There is no known exploitation of CVE-2026-20495 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-2026-20482 Denial of service 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-854r-9p65-g453.