Security researcher Chaotic Eclipse (aka Nightmare-Eclipse) has released a new proof-of-concept (PoC) exploit called LegacyHive.

It has been described as a Windows User Profile Service arbitrary hive load elevation of privileges vulnerability. The Windows User Profile Service, also referred to as ProfSvc, is a core system component that manages user accounts and environments.

"The PoC requires



Source: TheHackerNews
Source Link: https://thehackernews.com/2026/07/researcher-drops-new-windows-zero-day.html