Priority reviewHigh

CVE-2023-21819

Microsoft Windows 10 Version 1809, Windows 10 Version 20H2, Windows 10 Version 21H2

CVE-2023-21819 affects Microsoft Windows 10 Version 1809, Windows 10 Version 20H2, Windows 10 Version 21H2. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS: 7.5
EPSS: 30.8%
CISA KEV: Not listed
Published: 2023.02.15

PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV

Exploit probability30.8%

Technical severityCVSS 7.5

Vulnerability overview

Affected product and versions

Product: Microsoft Windows 10 Version 1809, Windows 10 Version 20H2, Windows 10 Version 21H2
Affected versions: >= 10.0.17763.0 < 10.0.17763.4010, >= 10.0.0 < 10.0.17763.4010, >= 10.0.0 < 10.0.19042.2604, >= 10.0.19043.0 < 10.0.19044.2604, >= 10.0.19045.0 < 10.0.19045.2604, >= 10.0.0 < 10.0.22621.1574, >= 10.0.20348.0 < 10.0.20348.1547, < 10.0.22000.1574
Fixed versions: 10.0.17763.4010, 10.0.19042.2604, 10.0.19044.2604, 10.0.19045.2604, 10.0.22000.1574

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Microsoft Windows 10 Version 1809, Windows 10 Version 20H2, Windows 10 Version 21H2 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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-125