HIGH CISA KEV Actively Exploited

CVE-2026-21519

Desktop Window Manager Elevation of Privilege Vulnerability

CVSS v3

7.8

HIGH

EPSS Score

2.5 %

exploit probability, as of 2026-10-03

CISA KEV

Yes

known exploited

Exploitation

active

SSVC status

Description

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

CISA Known Exploited Vulnerability

Date Added: 2026-02-10
Patch Due Date: 2026-03-03
Ransomware Use: Unknown

Technical details

Published: 2026-02-10
Last Modified: 2026-02-11

Frequently asked questions

What is CVE-2026-21519?

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

Is CVE-2026-21519 actively exploited?

Yes. CVE-2026-21519 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-03-03.

What is the CVSS score for CVE-2026-21519?

CVE-2026-21519 has a CVSS v3 base score of 7.8 (HIGH severity).

Is CVE-2026-21519 affecting your environment?

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