Sectigo: Mojibake in certificate Subject fields

Sectigo identified an issue where certificates contained Mojibake in Subject fields due to encoding errors. The problem was first discovered during an internal investigation on July 12, 2021, leading to the revocation of 41 affected certificates. Sectigo implemented a Character Set Review process to mitigate future occurrences and has since made several updates, including the introduction of an Exception List for commonly used words. The issue has been resolved with the deployment of automated checks to prevent misissuance.

1. 2021-07-12 Internal investigation reveals Mojibake in Subject fields.
2. 2021-07-17 All known affected certificates revoked.
3. 2021-09-30 Character Set Review process goes live.
4. 2022-01-11 Mojibake exception list functionality deployed.
5. 2022-02-15 Automatic pre-issuance check for disallowed Unicode characters deployed.
6. 2022-03-16 Automated solution for blocking misissuance implemented.