Lets Encrypt planned to revoke more than 3 million certificates on Wednesday after a bug that allowed an important security check performed during TLS issuance to be bypassed. The decision not to revoke all of the certificates drew Let’s Encrypt some flak. A U.K.-based security researcher Scott Helme tweets that the risk is likely low that the certificate was mis-issued. Let’s encryption is evidence with a padlock on most browsers or https appearing before a domain name.”]
Source: https://www.govinfosecurity.com/lets-encrypt-we-wont-revoke-all-certificates-right-now-a-13895