CVE-2021-34486: high-severity vulnerability in Microsoft Windows 10 Version 1809
Windows Event Tracing Elevation of Privilege Vulnerability
Published · Updated
73Vexday Risk Score
Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.
ssvc Actcvss 7.8epss 9.3%
from disclosure to weapon61 days
Published on NVDAug 12
1st PoC+61d
CISA KEV+228d
exploitation probability
9.3%top 5% of all CVEs
observed exploitation
yesCISA + VulnCheck
3 public exploit(s)
Action required by CISAfederal deadline: 2022-04-18
Apply updates per vendor instructions.
In short
A flaw in Windows Event Tracing allows an attacker to run commands with higher privileges than their account normally permits. An authenticated user can exploit this to gain system-level control.
Technical detail
Use-after-free vulnerability (CWE-416) in Windows Event Tracing enabling local privilege escalation. Attack vector requires local access and valid user credentials; successful exploitation results in SYSTEM-level code execution.
Summary generated and translated by AI from the official description.
The full analysis of this CVE is available in Portuguese →
Windows Event Tracing Elevation of Privilege Vulnerability
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 1909Microsoft · Windows 10 Version 2004Microsoft · Windows 10 Version 20H2Microsoft · Windows 10 Version 21H1Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server version 2004Microsoft · Windows Server version 20H2public PoCs found — 3
githubgithub.com/KaLendsi/CVE-2021-34486★ 51githubgithub.com/b1tg/CVE-2021-34486-exp★ 0vulncheckvulncheck.com/xdb/88847e980e21unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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