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4 results for “Nightmare Eclipse”
New Microsoft Defender 'ShieldCrash' zero-day grants SYSTEM access
A zero-day exploit named 'ShieldCrash' targeting Microsoft Defender was publicly released by an anonymous researcher shortly after Microsoft's September 2026 Patch Tuesday, exposing a vulnerability that grants SYSTEM-level privileges.
Sep 9, 2026
After Microsoft threatened legal action, a security researcher publishes a new Windows zero-day bug
A security researcher named Nightmare Eclipse publicly disclosed a new Windows zero-day vulnerability after Microsoft issued a public legal threat against them.
Aug 12, 2026
New Microsoft Defender 'ShieldBreak' zero-day grants SYSTEM privileges
A threat actor named Nightmare Eclipse disclosed a zero-day exploit ('ShieldBreak') targeting Microsoft Defender that grants SYSTEM-level privileges, emerging shortly after Microsoft's August 2026 Patch Tuesday updates.
Aug 13, 2026
New Windows LegacyHive zero-day gives hackers admin privileges
A security researcher publicly released a zero-day exploit named LegacyHive that bypasses Windows privilege restrictions on fully patched systems, posing immediate risk to enterprise and consumer endpoints.
Jul 17, 2026