CVE-2021-34486
Windows Event Tracing Elevation of Privilege Vulnerability
Windows Event Tracing Elevation of Privilege Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Event Tracing Elevation of Privilege Vulnerability
Windows Event Tracing Elevation of Privilege Vulnerability
- Record
CVE-2021-34486- CVSS 3.1
- 7.8 High
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 - Weakness
- CWE-416
- Updated
- 2026-11-02
EUVDEUVD-2021-21140
Windows Event Tracing Elevation of Privilege Vulnerability
- Record
EUVD-2021-21140- CVSS 3.1
- 7.8 High
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-793m-wq3j-whvr
Windows Event Tracing Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2021...
Windows Event Tracing Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2021-26425, CVE-2021-34487.
- Record
GHSA-793m-wq3j-whvr- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-269, CWE-416
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Windows Event Tracing Privilege Escalation Vulnerability
Microsoft Windows Event Tracing contains an unspecified vulnerability which can allow for privilege escalation.
- Record
CVE-2021-34486- Weakness
- CWE-416
- Updated
- 2026-11-02
NVD
Windows Event Tracing Elevation of Privilege Vulnerability
- Record
CVE-2021-34486- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 4.6 Medium
AV:L/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-416
- Updated
- 2026-11-02
Affected products
- microsoft windows
- microsoft windows 10 version 1809
- microsoft windows 10 version 1909
- microsoft windows 10 version 2004
- microsoft windows 10 version 20h2
- microsoft windows 10 version 21h1
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server version 2004
- microsoft windows server version 20h2
- microsoft windows 10 1809
- microsoft windows 10 1909
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | KaLendsi/CVE-2021-34486 | 2021-10-12 |
| PoC in GitHub | b1tg/CVE-2021-34486-exp | 2021-10-27 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-34486 is a high vulnerability (CVSS 7.8) in Microsoft Windows, published August 12, 2021. CISA lists it as known to be exploited, since March 28, 2022. EUVD reports exploitation since March 28, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 9.33%, the 95th percentile. No source names a fixed version.