Microsoft Windows Kernel Privilege Escalation Vulnerability

Added to KEV
2022-05-23
Federal due date
2022-06-13
Vendor
Microsoft
Product
Windows
EPSS
93.9th percentile (score 0.119, as of 2026-06-08)
NVD CVSS v3.1
Ransomware use
Unknown
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2020-1027

CISA short description

An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.

Required action

Apply updates per vendor instructions.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.