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Tool Directory

CVE-2026-20871

HighPublished

Desktop Window Manager Elevation of Privilege Vulnerability

Published: Jan 13, 2026
Updated: Jul 30, 2026
Assigning CNA: microsoft
Evidence observed: Aug 25, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

4.2%

Low · next 30 days

Percentile: 90.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Use after free in Desktop Windows Manager allows an authorized attacker to elevate privileges locally.

Sources

-SCTT-2026-33-0002-DWM-Visual-Field-SingularityExploit
Weaponizes a Visual-Field Singularity in Windows Desktop Window Manager to achieve local privilege escalation to SYSTEM, bypassing Graphics Isolation and VBS via temporal visual overlays.
SCTT-2026-33-0002-DWM-Visual-Field-SingularityExploit
Exploit research targeting Windows DWM to achieve local privilege escalation via a theoretical Visual-Field Singularity, bypassing graphics isolation and VBS.

Responsible use

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