CVE-2022-21882VulnerabilityPublished 02/04/2022Updated 10/24/2026
CVE-2022-21882: Microsoft Win32k Privilege Escalation Vulnerability
Affects Microsoft Win32kSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 02/04/2022
- KEV deadline
- 02/18/2022
- Ransomware
- Used in ransomware campaigns
- EPSS
- 59.2% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
Description
CVE-2022-21882 is a high-severity privilege escalation vulnerability in Microsoft Win32k. The vulnerability is unspecified in detail but is known to be exploited in the wild, including use in ransomware campaigns. No specific affected versions or patch information is provided.