CISA KEV · Known exploitedHigh

CVE-2022-21882

Microsoft Win32k

CVE-2022-21882 affects Microsoft Win32k. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS: 7.8
EPSS: 54.6%
CISA KEV: Listed
Published: 2022.01.12

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability54.6%

Technical severityCVSS 7.8

Vulnerability overview

CVE-2022-21882 affects Microsoft Win32k. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

Affected product and versions

Product: Microsoft Win32k
Affected versions: 10.0.17763.0, 10.0.0, 10.0.20348.0, 10.0.19043.0, < 10.0.17763.2452, < 10.0.18363.2037, < 10.0.19042.1466, < 10.0.19043.1466, < 10.0.19044.1466, < 10.0.22000.434, < 10.0.20348.469
Fixed versions: 10.0.17763.2452, 10.0.18363.2037, 10.0.19042.1466, 10.0.19043.1466, 10.0.19044.1466, 10.0.22000.434, 10.0.20348.469

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2022.02.18

1
Identify
Confirm that Microsoft Win32k and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-787
KEV added: 2022.02.04
Ransomware use: 미확인