CVEs / CVE-2022-21971

CVE-2022-21971: Microsoft Windows Runtime Remote Code Execution Vulnerability

Known exploited in the CISA KEV catalog since 18 Aug 2022
high 9.3 CVSS 2.0 (NVD)
EPSS 53.7% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
Last changed at its sources 17 Jun 2026

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Summary

Microsoft Windows Runtime contains an unspecified vulnerability that allows for remote code execution.
CISA, Known Exploited Vulnerabilities catalog

Description

Windows Runtime Remote Code Execution Vulnerability
The CVE record, via NVD · published 9 Feb 2022 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
Microsoft Windows 10 Version 1809	from 10.0.17763.0, before 10.0.17763.2565	10.0.17763.2565
Microsoft Windows 10 Version 1809	from 10.0.0, before 10.0.17763.2565	10.0.17763.2565
Microsoft Windows Server 2019	from 10.0.17763.0, before 10.0.17763.2565	10.0.17763.2565
Microsoft Windows Server 2019 (Server Core installation)	from 10.0.17763.0, before 10.0.17763.2565	10.0.17763.2565
Microsoft Windows 10 Version 1909	from 10.0.0, before 10.0.18363.2094	10.0.18363.2094
Microsoft Windows 10 Version 21H1	from 10.0.0, before 10.0.19043.1526	10.0.19043.1526
Microsoft Windows Server 2022	from 10.0.20348.0, before 10.0.20348.524	10.0.20348.524
Microsoft Windows 10 Version 20H2	from 10.0.0, before 10.0.19042.1526	10.0.19042.1526
Microsoft Windows Server version 20H2	from 10.0.0, before 10.0.19042.1526	10.0.19042.1526
Microsoft Windows 11 version 21H2	from 10.0.0, before 10.0.22000.493	10.0.22000.493
Microsoft Windows 10 Version 21H2	from 10.0.19043.0, before 10.0.19044.1526	10.0.19044.1526

Exploitation

In CISA KEV since	18 Aug 2022
Due date for US federal agencies	8 Sep 2022
Used in ransomware campaigns	Unknown
Required action	Apply updates per vendor instructions.

Severity

CVSS 2.0	9.3 high `AV:N/AC:M/Au:N/C:C/I:C/A:C` Scored by NVD
Weakness	CWE-824

References

CVE-2022-21971 on NVD
CVE-2022-21971 in the CISA KEV catalog
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21971 (cited by CISA)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21971 Patch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-21971 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.