DigiCert Root Certificates Incorrectly Detected as Malware by Microsoft Defender

On May 3, 2026, system administrators and everyday users worldwide experienced a sudden, massive spike in severe security alerts from Microsoft Defender. The native Windows security platform began aggressively flagging system files as “Trojan:Win32/Cerdigent.A!dha.” This unexpected detection caused widespread panic across IT departments, leading many professionals to believe a sophisticated threat actor had actively compromised […]

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