Cybernews

Disgruntled hacker drops second zero-day Windows Defender exploit just hours after Microsoft patches first one

A disgruntled researcher released a second zero-day Windows Defender exploit, dubbed RedSun, shortly after Microsoft patched ...
Dark Reading

Exploits Turn Windows Defender Into Attacker Tool

Three proof-of-concept exploits are being used in active attacks against Microsoft's built-in security platform; two are ...

Hackers are abusing unpatched Windows security flaws to hack into organizations

A security researcher published details of three security vulnerabilities in Windows Defender, and the code used to exploit ...

Recently leaked Windows zero-days now exploited in attacks

Threat actors are exploiting three recently disclosed Windows security vulnerabilities in attacks aimed at gaining SYSTEM or ...
The Hacker News

Three Microsoft Defender Zero-Days Actively Exploited; Two Still Unpatched

Three Defender zero-days exploited since April 10, 2026, enabling privilege escalation and DoS, forcing isolation of affected ...

Angry Hacker Drops Microsoft Zero-Day Exploit, 1 Billion Users Warned

A security researcher frustrated with Microsoft has released the BlueHammer Windows zero-day exploit, telling the company, “I ...

Unpatched Microsoft Defender flaw lets hackers gain admin access

A security vulnerability was recently discovered in Microsoft Defender, the first-party Windows 11 antivirus tool used by ...

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

A security researcher frustrated with Microsoft has released the BlueHammer Windows zero-day exploit, telling the company, “I'm not explaining how this works.” ...