Windows 0-day lets normal users access other users' settings

Published June 29, 2026

A proof-of-concept exploit dubbed LegacyHive has been released, enabling a Windows elevation-of-privilege vulnerability in the Windows User Profile Service that allows a standard user to load another user’s registry hive under their own registry classes root. Registry hives are files that store configuration data for Windows, services, applications, and user profiles.

Severity
Not scoredNo CVSS score recorded
Fix
Not confirmed
Affects
Windows
Exploited
Not confirmedNo confirmation recorded