The Bottom Line: HARICA revoked TLS/SSL certificates on July 25, 2026 at 12:00 UTC, forcing rapid migration to alternative certificates for affected systems.
The certificate authority HARICA revoked a large number of server certificates on July 25, 2026 at 12:00 UTC. This requires affected organizations to promptly review their certificate inventories and potentially renew them.
The certificate authority HARICA (Hellenic Academic and Research Institutions Certificate Authority) revoked server certificates using the TLS/SSL protocol on July 25, 2026 at 12:00 UTC. The scope of affected certificates and the precise reason for the revocation are not fully documented in the source.
CISOs should immediately review their TLS/SSL certificate inventories to determine whether their organization is affected by this revocation. Particularly critical are production systems and public web presences, as invalid certificates can lead to connection failures and thus availability disruptions.
If HARICA certificates are in use, they must be replaced as quickly as possible with valid certificates. The review should include both internally managed certificates and those from third-party providers.
Source: borncity.com · Published July 26, 2026
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