CVE-2026-21519

7.8 HIGH CISA KEV - Actively Exploited

Published: February 10, 2026 Modified: February 11, 2026

Description

Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

0.0 Low Medium High Critical 10.0

Vector String

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

Patch Vendor Advisory Exploit Third Party Advisory

Source: secure@microsoft.com

Vendor Advisory

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

2 reference(s) from NVD

CVSS v3 Score

7.8 / 10.0

EPSS (Exploit Probability)

3.6%

88th percentile

Exploitation Status

Actively Exploited

Remediation due: 2026-03-03

CWE-843

microsoft