Microsoft Defender Mistakenly Flags DigiCert Root Certificates as Malware

Microsoft Defender triggered widespread false positive alerts after a faulty security update caused it to flag two legitimate DigiCert root certificates as malicious, potentially disrupting SSL/TLS validation and code-signing operations across enterprise environments worldwide. A Defender antimalware signature update released around April 30, 2026, introduced a detection labeled Trojan:Win32/Cerdigent.A!dha, which incorrectly identified registry entries belonging […]

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