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1 Billion Microsoft Users Warned As Angry Hacker Drops 0-Day Exploit

ID: 4280fae2-3fe4-50f6-abe9-370cbb3e73e3

STIX ID: report--4280fae2-3fe4-50f6-abe9-370cbb3e73e3

Feed Name: DataBreaches.Net

Threat Score
75/100

Date Published: 2026-04-07

Date Updated: 2026-04-19

Author: Dissent

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Forbes reports that a security researcher known as “Chaotic Eclipse” published BlueHammer, exploit code for an unpatched Windows zero-day to a public GitHub repository while criticizing the Microsoft Security Response Center; a patch is not available and there is no confirmation of active exploitation.

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