New Windows zero-day exploit 'ShieldBreak' disclosed, possibly patched

By PulseAugur Editorial · [1 sources] · 2026-08-13 17:36

A security researcher known as Nightmare Eclipse has disclosed a new zero-day vulnerability, dubbed ShieldBreak, affecting Microsoft Windows. This exploit allows for privilege escalation, granting system-level access from a standard user account. However, it appears Microsoft may have already addressed the vulnerability, with early testing indicating detection by Microsoft Defender Antivirus and potential patching in recent updates. AI

RANK_REASON Disclosure of a specific vulnerability in a widely used operating system, with potential for immediate patching.

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AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

New Windows zero-day exploit 'ShieldBreak' disclosed, possibly patched

COVERAGE [1]

Tom's Hardware TIER_1 English(EN) · Bruno Ferreira · 2026-08-13 17:36

Microsoft's nemesis drops new zero-day privilege escalation vulnerability — attack grants system-level privileges, but it could already be patched

Nightmare Eclipse drops ShieldBreak, another Windows zero-day privilege escalation vulnerability, but Microsoft has rushed quickly to block it with Defender

COVERAGE [1]

Microsoft's nemesis drops new zero-day privilege escalation vulnerability — attack grants system-level privileges, but it could already be patched

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