Actively exploited in the wild
Microsoft Windows User Profile Service Privilege Escalation Vulnerability
Microsoft - Windows · Listed in the CISA KEV since 2022-03-31. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2021-34484
HighCVSS 7.8KEVExploitation Probability (EPSS)
Very high risk97th percentile - higher than 97% of all known CVEs
Summary
An elevation of privilege vulnerability in the Windows User Profile Service.
Risk Assessment
An attacker could exploit this to gain elevated privileges, potentially leading to unauthorized access to data or the system.
Recommendation
Apply the security update released by Microsoft.
Other vulnerabilities in Windows User Profile Service
See all- CVE-2022-26904HighActively exploited
A privilege elevation vulnerability in the Windows User Profile Service. It requires authentication as a local user.
- CVE-2022-21919HighActively exploited
Windows User Profile Service Elevation of Privilege Vulnerability.
- CVE-2026-62832High
Improper link resolution before file access ('link following') in Windows User Profile Service allows an authorized attacker to elevate privileges locally.
- CVE-2021-26873High
Elevation of privilege vulnerability in Windows User Profile Service. Allows an attacker to gain higher privileges.
Original NVD description (English source)
Windows User Profile Service Elevation of Privilege Vulnerability