CVE-2022-21888: Windows Modern Execution Server Remote Code Execution Vulnerability

Severity: critical (CVSS 9.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-01-11 · updated 2026-06-17

Description

Windows Modern Execution Server Remote Code Execution Vulnerability

Affected products

Microsoft Windows 10 Version 1607: 20h2, 21h1, 21h2, 1809, 1909
Microsoft Windows 11 version 21H2: all versions
Microsoft Windows Server: 20h2, 2022
Microsoft Windows Server 2019: all versions
Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.2452 — fixed in 10.0.17763.2452
Microsoft Windows 10 1909: from 10.0.0 before 10.0.18363.2037 — fixed in 10.0.18363.2037
Microsoft Windows 10 20H2: from 10.0.0 before 10.0.19042.1466 — fixed in 10.0.19042.1466
Microsoft Windows 10 21H1: from 10.0.0 before 10.0.19043.1466 — fixed in 10.0.19043.1466
Microsoft Windows 10: from 10.0.19043.0 before 10.0.19044.1466 — fixed in 10.0.19044.1466
Microsoft Windows 11 21H2: from 10.0.0 before 10.0.22000.434 — fixed in 10.0.22000.434
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.2452 — fixed in 10.0.17763.2452
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.469 — fixed in 10.0.20348.469
Microsoft Windows Server version 20H2: from 10.0.0 before 10.0.19042.1466 — fixed in 10.0.19042.1466

How to fix

Upgrade to a fixed version: Microsoft Windows 10 10.0.17763.2452; Microsoft Windows 10 1909 10.0.18363.2037; Microsoft Windows 10 20H2 10.0.19042.1466; Microsoft Windows 10 21H1 10.0.19043.1466; Microsoft Windows 10 10.0.19044.1466; Microsoft Windows 11 21H2 10.0.22000.434; Microsoft Windows Server 2019 10.0.17763.2452; Microsoft Windows Server 2022 10.0.20348.469; Microsoft Windows Server version 20H2 10.0.19042.1466. Check the vendor advisory for mitigations.

References

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