HIGH CISA KEV

CVE-2026-81963

CVSS v3

7.8

HIGH

EPSS Score

0.6 %

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

CISA Known Exploited Vulnerability

Date Added: 2026-09-08
Patch Due Date: 2026-09-22
Ransomware Use: Unknown

Technical details

CVSS v3 Vector: 3.1
Published: 2026-09-08
Last Modified: 2026-09-09
CERT-FR Advisory: CERTFR-2026-AVI-1147
CERT-FR Link: CERTFR-2026-AVI-1147

Frequently asked questions

What is CVE-2026-81963?

Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

Is CVE-2026-81963 actively exploited?

Yes. CVE-2026-81963 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 2026-09-22.

What is the CVSS score for CVE-2026-81963?

CVE-2026-81963 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string 3.1.

Is CVE-2026-81963 affecting your environment?

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