Is CVE-2022-21971 being actively exploited?

Yes. CVE-2022-21971 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on August 18, 2022.

What is the CVSS score for CVE-2022-21971?

CVE-2022-21971 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2022-21971

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 53.9%EU EUVD: exploited

Windows Runtime Remote Code Execution Vulnerability

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-824
EPSS score: 53.9% (99th percentile)
In CISA KEV: Yes, added August 18, 2022
In EU EUVD: Yes (EUVD-2022-27126)
Published: February 9, 2022
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Windows Runtime Remote Code Execution Vulnerability

Added to the KEV catalog on August 18, 2022; federal remediation due September 8, 2022.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2022-27126 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

microsoft / windows 10 1809
microsoft / windows 10 1909
microsoft / windows 10 20h2
microsoft / windows 10 21h1
microsoft / windows 10 21h2
microsoft / windows 11 21h2
microsoft / windows server 2019
microsoft / windows server 2022
microsoft / windows server 20h2

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Microsoft Windows 10 version 1909 and Microsoft Windows Server version 1909 - Microsoft Corporation - Common Criteria 2019-47-INF-3134 - archived

References

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)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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