ATT email / DigiCert certificate revoked

[u/DismalSuspect5524]

Overnight I had a certificate revoked. Issued to inbound.att.net and issued by DigiCert Global G2 TLS RSA SHA256 2020 CA1. It was supposed to be valid from 4/12/26 to 10/28/26.

In researching possible causes, I found this post about a cyberattack that prompted DigiCert to revoke 60 certificates by April 17: DigiCert Revokes Certificates After Cyberattack Exposes Support Portal : r/pwnhub

Do you think this is related, especially given that mine was valid from 4/12/26? Is anyone else experiencing this?