CVE-2026-20497 Memory corruption in MediaTek chipset
A missing bounds check in MediaTek chipset firmware allows local privilege escalation via out-of-bounds write, requiring prior System privilege.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-20497?
CVE-2026-20497 is a medium-severity memory corruption 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 geniezone, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10965550 / ALPS11393405; Issue ID: MSV-6941.
Weakness: CWE-787
Which versions are affected by CVE-2026-20497?
It affects 11 products.
Products include Mediatek Mt6989 Firmware, Mediatek Mt8755 Firmware, Mediatek Mt8768 Firmware, Mediatek Mt8771 Firmware, Mediatek Mt8775 Firmware, Mediatek Mt8781 Firmware and 5 more.
How do I fix CVE-2026-20497?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-20497 being exploited?
There is no known exploitation of CVE-2026-20497 in the wild and no public exploit code.
Other vulnerabilities in MediaTek, Inc. MediaTek chipset
Sources
Also known as A-527617087, ASB-A-527617087, GHSA-76m9-f2pj-7mwp, M-ALPS10965550, M-ALPS11393405.