Tool
ShieldBreak
- First Reported
- Aug 12, 2026
- Latest Reported
- Sep 22, 2026
Reported Context (5)
- According to Naceri, ShieldCrash bypasses another ShieldBreak Defender privilege escalation flaw patched a week earlier, which itself bypassed RoguePlanet, another Defender flaw the security researcher disclosed in June Researcher releases BigDiskBuster zero-day that blocks Microsoft Defender updates
- The researcher also recently published PoCs for HardBreacher in Kaspersky Endpoint Security and ShieldBreak in Microsoft Defender, both targeting Windows security products and potentially leading to SYSTEM-level impact. Researcher Claims FalconFlank PoC Exploits CrowdStrike Falcon for Privilege Escalation
- Other exploits made public recently by Nightmare Eclipse include ShieldBreak, which allows an attacker to spawn a shell with System privileges, and LegacyHive, which enables privilege escalation. Nightmare Eclipse Releases HardBreacher Kaspersky Privilege-Escalation PoC
- ShieldBreak is a Windows proof of concept from Nightmare-Eclipse that chains Cloud Files, Object Manager manipulation, Defender APIs, and a timing race to achieve local privilege escalation on fully patched Windows ShieldBreak PoC Uses Windows Defender Cleanup Race for SYSTEM Privilege Escalation
- Nightmare Eclipse has released ShieldBreak, a new Microsoft Defender zero-day exploit that bypasses the patched RoguePlanet flaw and can elevate attackers to SYSTEM privileges on fully patched Windows systems. ShieldBreak Exploit Reportedly Bypasses Patched Defender Flaw to Gain SYSTEM Privileges
CVE (2)
People (6)
MITRE ATT&CK (8)
Vendors (3)
Products (12)
Tools (11)
Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.
