CVE-2026-20465 Memory corruption in MediaTek chipset
A missing bounds check in the MediaTek WLAN AP driver allows remote attackers to escalate privileges via an out-of-bounds write.
- 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-2026-20465?
CVE-2026-20465 is a high-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 wlan AP driver, there is a possible out of bounds write due to a missing bounds check. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00489200; Issue ID: MSV-7834.
Weakness: CWE-122
Which versions are affected by CVE-2026-20465?
How do I fix CVE-2026-20465?
No fix has been published for CVE-2026-20465 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-2026-20465 being exploited?
There is no known exploitation of CVE-2026-20465 in the wild and no public exploit code.
Sources
Also known as GHSA-q4fj-5hvx-3jc4.