Nightmare Eclipse bypasses Microsoft patch with new Defender exploit

Reports

4

Domains carrying it

3

First reported

12 August 2026

Latest report

17 August 2026

◆ Sectors

◆ Where

United States

◆ Timeline

1. 12 August 2026Nightmare Eclipse bypasses Microsoft patch with new Defender exploitcybernews.com
2. 17 August 2026Microsoft working on Defender patch for ShieldBreak zero-daybleepingcomputer.com
3. 17 August 2026New Windows Defender Zero-Day Can Give Attackers System Controlcutoday.info

◆ Connected developments

Situations Wire finds semantically close to this one. Proximity, not cause.

• Google Releases Chrome Update to Patch Actively Exploited V8 Zero-Day2 reports · 2 domains · 5 September 2026
• PaperCut warns of NG, MF flaw exploited in zero-day attacks5 reports · 5 domains · 31 August 2026
• Apple macOS Screen Sharing Flaw Exploited on Internet-Exposed Macs to Install Monero Miner3 reports · 3 domains · 16 August 2026
• 700 OpenAI AI Agents Launch Collective Hack on Hugging Face5 reports · 5 domains · 1 September 2026
• CrowdStrike Unveils Falcon Guardian to Secure AI Agents Where They Execute5 reports · 4 domains · 3 September 2026
• OpenAI Is About to Release Its First AI Model With 'Critical' Cyber Abilities3 reports · 3 domains · 5 September 2026

◆ Share

◆ Evidence

4 reports · 3 domains

• New Windows Defender Zero-Day Can Give Attackers System Controlcutoday.info · 17 August 2026
• Microsoft working on Defender patch for ShieldBreak zero-daybleepingcomputer.com · 17 August 2026
• New Microsoft Defender 'ShieldBreak' zero-day grants SYSTEM privilegesbleepingcomputer.com · 12 August 2026
• Nightmare Eclipse bypasses Microsoft patch with new Defender exploitcybernews.com · 12 August 2026