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

> Prolific hacker and Microsoft nemesis 'Nightmare Eclipse' has just published ShieldBreak, yet another Windows zero-day vulnerability that ought to get you SYSTEM-level privileges just by running some code as a regular…

- **Source:** [Tom's Hardware](https://www.tomshardware.com/tech-industry/cyber-security/microsofts-nemesis-drops-new-zero-day-privilege-escalation-vulnerability-attack-grants-system-level-privileges-but-it-could-already-be-patched?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6a7e0a6eef4cce27cbc34605)
- **Published:** 2026-08-13
- **Category:** Computers & IT
- **Tags:** #microsoft #windows
- **Canonical:** http://localhost:4321/a/6a7e0a6eef4cce27cbc34605

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_GearOpen's distilled summary. The full original article is published at Tom's Hardware (source link above); GearOpen does not republish the source's full text._