CVE-2021-36927: Windows Digital TV Tuner device registration application Elevation of Privilege Vulnerability

Severity: medium (CVSS 4.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-12 · updated 2026-08-10
Weakness: CWE-269

Description

Windows Digital TV Tuner device registration application Elevation of Privilege Vulnerability

Affected products

Microsoft Windows 7: all versions
Microsoft Windows 8.1: all versions
Microsoft Windows RT 8.1: all versions
Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows 7: from 6.1.0 before 6.1.7601.25898 — fixed in 6.1.7601.25898
Microsoft Windows 7 Service Pack 1: from 6.1.0 before 6.1.7601.25898 — fixed in 6.1.7601.25898
Microsoft Windows 8.1: from 6.3.0 before 6.3.9600.20303 — fixed in 6.3.9600.20303
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.25898 — fixed in 6.1.7601.25898
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.21416 — fixed in 6.0.6003.21416
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.23645 — fixed in 6.2.9200.23645
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.20303 — fixed in 6.3.9600.20303

How to fix

Upgrade to a fixed version: Microsoft Windows 7 6.1.7601.25898; Microsoft Windows 7 Service Pack 1 6.1.7601.25898; Microsoft Windows 8.1 6.3.9600.20303; Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.25898; Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21416; Microsoft Windows Server 2012 6.2.9200.23645; Microsoft Windows Server 2012 R2 6.3.9600.20303. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-36927 or the next vulnerability affects your stack