Microsoft Defender Incorrectly Detects DigiCert Root Certificates as Malware

Microsoft Defender erroneously flagged and quarantined two legitimate DigiCert root certificates after a security intelligence update (detection Trojan:Win32/Cerdigent.A!dha), causing SSL/TLS failures, browser trust warnings, and validation problems for signed applications across enterprise environments; Microsoft acknowledged the issue and released corrected updates (notably v1.430) that restored certificates in many environments and provided remediation guidance for administrators.