Exploited· due 2022-04-187.8highHigh
CVE-2021-34486
Microsoft Windows 10 1809
Windows Event Tracing Elevation of Privilege Vulnerability
Exploitation status
- CISA has confirmed this is being exploited in the wild. That is an observation of real attacks, not a prediction.
- US federal civilian agencies are required to remediate it by 2022-04-18. That deadline does not bind private companies, but it is a reasonable benchmark for how urgently CISA views it.
- A vendor advisory or patch reference has been published.
Required action
Apply updates per vendor instructions.
CISA’s wording, unedited.
What the metrics mean
- It is requires local access to the machine.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, an ordinary user account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 7.8 (v3.1)
- Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness
- CWE-416
- Assigned by
- secure@microsoft.com
Dates
- Published
- 2021-08-12
- Last modified
- 2026-08-10
- Added to KEV
- 2022-03-28
- Remediation due
- 2022-04-18
- Sources
- CISA KEV, NVD
Affected products
- Microsoft Windows 10 1809- 10.0.17763.2114
- Microsoft Windows 10 1909- 10.0.18363.1734
- Microsoft Windows 10 2004- 10.0.19041.1165
- Microsoft Windows 10 20h2- 10.0.19042.1165
- Microsoft Windows 10 21h1- 10.0.19043.1165
- Microsoft Windows Server 2004- 10.0.19041.1165
- Microsoft Windows Server 2019- 10.0.17763.2114
- Microsoft Windows Server 20h2- 10.0.19042.1165
As listed in the NVD configuration data. Not a statement about your estate.