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6.7
CVE-2026-20508: Power HAL may let attacker gain higher access
CVE-2026-20508 · published 1 month ago
Summary
The Power hardware abstraction layer in Windows can be tricked into treating data as the wrong type, allowing someone who already has system rights to elevate their privileges further. This can be done without any user interaction. Apply the latest Microsoft update that includes patch ALPS11165543 to close the 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 | MT2718 |
Original advisory text
In Power HAL, there is a possible escalation of privilege due to type confusion. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. Use...
In Power HAL, there is a possible escalation of privilege due to type confusion. 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: ALPS11165543; Issue ID: MSV-9012.
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
6.7
Medium
Type
CWE-843Type Confusion
Timeline
Published7 Sep 2026
Updated26 Oct 2026
First seen7 Sep 2026
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