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 […] The post Microsoft Defender Mistakenly Flags DigiCert Root Certificates as Malware appeared first on Cyber Security News.
Microsoft Defender mistakenly flagged two legitimate DigiCert root certificates as malicious, causing widespread false positive alerts and potentially disrupting enterprise environments' SSL/TLS validation and code-signing operations. The faulty security update was released around April 30, 2026.
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