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

• Severity: critical (CVSS 9.3 v2.0)
• Exploited in the wild: yes — in CISA KEV since 2022-08-18
• EPSS: 53.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-02-09 · updated 2026-06-17
• Weakness: CWE-824

Description

Windows Runtime Remote Code Execution Vulnerability

Affected products

• Microsoft Windows 10: before 10.0.17763.2565 — fixed in 10.0.17763.2565
• Microsoft Windows 10 1909: before 10.0.18363.2094 — fixed in 10.0.18363.2094
• Microsoft Windows 10 20H2: before 10.0.19042.1526 — fixed in 10.0.19042.1526
• Microsoft Windows 10 21H1: before 10.0.19043.1526 — fixed in 10.0.19043.1526
• Microsoft Windows 10: before 10.0.19044.1526 — fixed in 10.0.19044.1526
• Microsoft Windows 11 21H2: before 10.0.22000.493 — fixed in 10.0.22000.493
• Microsoft Windows Server 2019: before 10.0.17763.2565 — fixed in 10.0.17763.2565
• Microsoft Windows Server 2022: before 10.0.20348.524 — fixed in 10.0.20348.524
• Microsoft Windows Server 20H2: before 10.0.19042.1526 — fixed in 10.0.19042.1526
• Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.2565 — fixed in 10.0.17763.2565
• Microsoft Windows 10 1909: from 10.0.0 before 10.0.18363.2094 — fixed in 10.0.18363.2094
• Microsoft Windows 10 20H2: from 10.0.0 before 10.0.19042.1526 — fixed in 10.0.19042.1526
• Microsoft Windows 10 21H1: from 10.0.0 before 10.0.19043.1526 — fixed in 10.0.19043.1526
• Microsoft Windows 10: from 10.0.19043.0 before 10.0.19044.1526 — fixed in 10.0.19044.1526
• Microsoft Windows 11 21H2: from 10.0.0 before 10.0.22000.493 — fixed in 10.0.22000.493
• Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.2565 — fixed in 10.0.17763.2565
• Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.524 — fixed in 10.0.20348.524
• Microsoft Windows Server version 20H2: from 10.0.0 before 10.0.19042.1526 — fixed in 10.0.19042.1526

How to fix

Upgrade to a fixed version: Microsoft Windows 10 10.0.17763.2565; Microsoft Windows 10 1909 10.0.18363.2094; Microsoft Windows 10 20H2 10.0.19042.1526; Microsoft Windows 10 21H1 10.0.19043.1526; Microsoft Windows 10 10.0.19044.1526; Microsoft Windows 11 21H2 10.0.22000.493; Microsoft Windows Server 2019 10.0.17763.2565; Microsoft Windows Server 2022 10.0.20348.524; Microsoft Windows Server 20H2 10.0.19042.1526; Microsoft Windows 10 10.0.17763.2565; Microsoft Windows 10 1909 10.0.18363.2094; Microsoft Windows 10 20H2 10.0.19042.1526. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21971
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21971
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-21971

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