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Vulnerability · Published Dec 15, 2021 · Assigned by microsoft

CVE-2021-43883Windows Installer Elevation of Privilege Vulnerability

High 7.8

In plain English

A high-severity security flaw in Windows 10 Version 1507 from Microsoft. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 12.1% (higher than 96% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)12.1%top 3.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Public PoC

Official description

Windows Installer Elevation of Privilege Vulnerability

Affected products (as reported)

VendorProductVersions
Microsoft Windows 10 Version 1809 10.0.0 – before 10.0.17763.2366
Microsoft Windows Server 2019 10.0.0 – before 10.0.17763.2366
Microsoft Windows Server 2019 (Server Core installation) 10.0.0 – before 10.0.17763.2366
Microsoft Windows 10 Version 1909 10.0.0 – before 10.0.18363.1977
Microsoft Windows 10 Version 21H1 10.0.0 – before 10.0.19043.1415
Microsoft Windows Server 2022 10.0.0 – before 10.0.20348.405
Microsoft Windows 10 Version 2004 10.0.0 – before 10.0.19041.1415
Microsoft Windows Server version 2004 10.0.0 – before 10.0.19041.1415
Microsoft Windows 10 Version 20H2 10.0.0 – before 10.0.19042.1415
Microsoft Windows Server version 20H2 10.0.0 – before 10.0.19042.1415
Microsoft Windows 11 version 21H2 10.0.0 – before 10.0.22000.376
Microsoft Windows 10 Version 21H2 10.0.0 – before 10.0.19044.1415
Microsoft Windows 10 Version 1507 10.0.0 – before 10.0.10240.19145
Microsoft Windows 10 Version 1607 10.0.0 – before 10.0.14393.4825
Microsoft Windows Server 2016 10.0.0 – before 10.0.14393.4825
Microsoft Windows Server 2016 (Server Core installation) 10.0.0 – before 10.0.14393.4825
Microsoft Windows 7 6.1.0 – before 6.1.7601.25796
Microsoft Windows 7 Service Pack 1 6.1.0 – before 6.1.7601.25796
Microsoft Windows 8.1 6.3.0 – before 6.3.9600.20207
Microsoft Windows Server 2008 Service Pack 2 6.0.0 – before 6.0.6003.21309
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.0 – before 6.0.6003.21309
Microsoft Windows Server 2008 Service Pack 2 6.0.0 – before 6.0.6003.21309
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.0 – before 6.1.7601.25796
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.0.0 – before 6.1.7601.25796
Microsoft Windows Server 2012 6.2.0 – before 6.2.9200.235456.2.0 – before 6.2.9200.23540
Microsoft Windows Server 2012 (Server Core installation) 6.2.0 – before 6.2.9200.235456.2.0 – before 6.2.9200.23540
Microsoft Windows Server 2012 R2 6.3.0 – before 6.3.9600.20207
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.0 – before 6.3.9600.20207

References