LegacyHive - Geek Feed

Microsoft patches LegacyHive Windows zero-day vulnerability

August 16, 2026August 16, 2026 geekfeed0Tagged 0day, Elevation of Privileges, LegacyHive, Local Privilege Escalation, Nightmare Eclipse, Privilege Escalation, Proof of Concept, windows, Zero-Day

Microsoft has released security patches to address a Windows zero-day vulnerability known as “LegacyHive,” disclosed after the July 2026 Patch Tuesday. The security flaw was disclosed by a security researcher who uses the “Nightmare Eclipse” handle in protest of Microsoft’s bug bounty and vulnerability disclosure practices. Nightmare Eclipse published a LegacyHive proof-of-concept (PoC) exploit hours […]

2 mins read

Windows LegacyHive zero-day flaw gets free, unofficial patches

July 23, 2026July 23, 2026 geekfeed0Tagged 0day, 0patch, Elevation of Privileges, LegacyHive, Micropatch, microsoft, Nightmare Eclipse, Privilege Escalation, windows, Zero-Day

Free unofficial patches are available for a recently disclosed Windows zero-day flaw that allows attackers to escalate privileges on up-to-date Windows systems. The vulnerability (dubbed LegacyHive and without a CVE ID for easy tracking) was found by a security researcher using the “Nightmare Eclipse” handle in the Windows User Profile Service. Nightmare Eclipse disclosed it the day […]

3 mins read

New Windows LegacyHive zero-day gives hackers admin privileges

July 20, 2026July 20, 2026 geekfeed0Tagged 0day, Elevation of Privileges, exploit, LegacyHive, Local Privilege Escalation, Nightmare Eclipse, Privilege Escalation, Proof of Concept, windows, Zero-Day

A security researcher using the “Nightmare Eclipse” handle has released a Windows zero-day exploit dubbed LegacyHive that allows attackers to escalate privileges on up-to-date Windows systems. Nightmare Eclipse published a proof-of-concept (PoC) exploit hours after Microsoft released its July 2026 Patch Tuesday updates, saying that it abuses a security vulnerability in the Windows User Profile […]

2 mins read