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Vulnerability
Let’s Encrypt Halts All Certificate Issuance After Cross-Signed Root Certificate Incident
11 May 2026 dark6
Let's Encrypt temporarily suspended all certificate issuance on May 8, 2026, after engineers identified a critical issue with a cross-signed...
Vulnerability
Microsoft Defender False Positive Quarantines DigiCert Root Certificates, Risks Breaking SSL Across Enterprise Networks
4 May 2026 dark6
A faulty Microsoft Defender antimalware definition update incorrectly flagged two legitimate DigiCert root certificates as malware, automatically quarantining them from...