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8.1
CVE-2026-20465: Windows WLAN Driver Allows Unauthorized Access
CVE-2026-20465 · published 3 months ago
Summary
A security issue in the Windows WLAN driver could allow a nearby attacker to gain more access and control than they should have. This is a concern because it could be exploited without any action from the user. An update is available to fix this issue.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| mediatek, inc. | mediatek chipset | MT6890 |
Original advisory text
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 privileg...
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.
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker full control
Severity
8.1
High
Type
CWE-122Heap-based Buffer Overflow
Timeline
Published3 Aug 2026
Updated31 Oct 2026
First seen3 Aug 2026
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