CVE-2021-34484

7.8

HIGHCVSS v3.1 Base Score

2.78%

LOW RiskEPSS (86th percentile)

KEV

NVD-CWE-noinfo

Windows User Profile Service Elevation of Privilege Vulnerability

Published: 8/12/2021

Modified: 10/30/2025

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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Microsoft Windows User Profile Service Privilege Escalation Vulnerability

Vendor / Product:

Microsoft Windows

Required Action:

Apply updates per vendor instructions.

Due Date: 4/21/2022(OVERDUE)

Added to KEV:

3/31/2022

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2021-34484

View CISA KEV Catalog

Vulnerability Summary

CVSS v3 Score

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2 Score

4.6

AV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS Score (Exploitation Probability)

2.78%LOW Exploitation Risk

86th percentile

This vulnerability has a 2.78% probability of being exploited in the next 30 days, ranking higher than 86% of all scored CVEs.

CWE Classification

NVD-CWE-noinfo

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