CVE-2021-34486

Windows Event Tracing Elevation of Privilege Vulnerability

Score

CVSS 3.1 7.8 High

Status

Analyzed - secure@microsoft.com

Published

2021-08-12

Last modified

2026-08-10

Known exploited (CISA KEV)

since 2022-03-28, action due 2022-04-18: Apply updates per vendor instructions.

Weaknesses

CWE-416

Affected products

• Windows 10 1809 (Microsoft)
• Windows 10 1909 (Microsoft)
• Windows 10 2004 (Microsoft)
• Windows 10 20H2 (Microsoft)
• Windows 10 20h2 (Microsoft)
• Windows 10 21H1 (Microsoft)
• Windows 10 21h1 (Microsoft)
• Windows Server 2004 (Microsoft)
• Windows Server 2019 (Microsoft)
• Windows Server 20H2 (Microsoft)
• Windows Server 20h2 (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34486
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34486
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34486