Windows zero-day lets attackers crash or hijack apps
A flaw in Windows lets attackers send a special file to open in your apps. It can crash them or take control.
- Severity
- Not scoredNo CVSS score recorded
- Fix
- Not confirmed
- Affects
- Windows
- Exploited
- Not confirmedNo confirmation recorded
What to do
Check whether the installed Windows version is older than the fixed version in the vendor advisory or current release.
Wait for their next update or use a third-party antivirus with real-time protection until then.
Technical details
July 16, 2026 Nightmare Eclipse Drops ‘LegacyHive’ Windows Zero-Day The researcher stripped the proof-of-concept (PoC) exploit to prevent immediate exploitation of the vulnerability.