CVE-2021-34486
Published: March 28, 2022
Official Description
Microsoft Windows Event Tracing contains an unspecified vulnerability which can allow for privilege escalation.
CISA KEV Advisory
Microsoft Windows Event Tracing Privilege Escalation Vulnerability
Microsoft Windows Event Tracing contains an unspecified vulnerability which can allow for privilege escalation.
Apply updates per vendor instructions.
Risk Analysis
Microsoft Windows Event Tracing contains an unspecified vulnerability that can lead to privilege escalation. Given its high severity, an EPSS score of 0.34654, and confirmed exploitation, this is a critical issue that could allow an attacker to gain higher privileges on a compromised system.
This vulnerability has been actively exploited in the wild and is listed in CISA's KEV catalog, indicating confirmed real-world exploitation.
Apply the latest security updates from Microsoft to address the vulnerability in Windows Event Tracing. Regularly review and apply security patches to all Windows systems.
Technical Analysis
CVE-2021-34486 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2021-34486 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-34486 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1