CRITICALZero Day
Global

Microsoft working on Defender patch for ShieldBreak zero-day

·Source: BleepingComputer

Updated:

Executive Summary

Microsoft is working on a security patch for the "ShieldBreak" zero-day vulnerability disclosed last week by security researcher "Nightmare Eclipse" and now tracked as CVE-2026-69414. [...]

Analysis

Microsoft is working on a security patch for the "ShieldBreak" zero-day vulnerability disclosed last week by security researcher "Nightmare Eclipse" and now tracked as CVE-2026-69414. [...]

Indicators of Compromise (1)

CVE (1)
CVE-2026-69414
NVDMITRE CVE
Source Attribution

Originally published by BleepingComputer on Aug 17, 2026.

Related Threats

CRITICALZero Day

AI can find zero-days but still can’t reliably write secure code

In recent months, LLMs have gone from flooding open-source projects and bug bounty programs with questionable security reports that wasted developers’ time, to routinely finding zero-day flaws that humans and traditional security audit tools had missed for years — a rapid evolution in cyber capabilities that scares even their own creators . But despite these advances in vulnerability discovery and

CSO Online
MEDIUMZero Day

⚡ Weekly Recap: VMware Exploits, Windows 0-Day, MCP Attacks, Browser Hijacks and More

The expensive attacks are not always the clever ones. This week had plenty of proof. Exposed services got hit, old bugs found fresh use, browser sessions became attack paths, and supply-chain problems kept spreading farther than the original compromise. A lot of it came down to access that was already there and defenses that assumed nobody would look too closely. So, nothing magical. Just a

The Hacker News
CRITICALZero Day

Microsoft Faces Fresh Nightmare Eclipse Zero-Day

<img src="https://ismg-cdn.nyc3.cdn.digitaloceanspaces.com/articles/shield-breaks-microsoft-faces-fresh-nightmare-eclipse-zero-day-image_small-10-a-32573.jpg" align=right hspace=4><b>Attack Manipulates Defender Cloud Hydration to Install an Attacker DLL</b><br>Security researchers reproduced ShieldBreak, a claimed Windows Defender zero-day that manipulates cloud hydration and privileged Windows pr

Bank Info Security