CVE-2021-34484
KEVMicrosoft Windows User Profile Service Privilege Escalation Vulnerability
Description
Microsoft Windows User Profile Service contains an unspecified vulnerability that allows for privilege escalation.
Windows User Profile Service Elevation of Privilege Vulnerability
CVSS 3.1 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HPublishedAug 12, 2021
Last modifiedAug 10, 2026
Added to KEVMar 31, 2022
Remediation dueApr 21, 2022
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34484PatchVendor Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34484PatchVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34484US Government Resource
0 recent articles mention this CVE
71
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1651 days
- CVSS
- 7.8 HIGH
- EPSS (30-day exploit probability)
- 21.8% · top 2% of all CVEs
- Weakness
- NVD-CWE-noinfo
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.