The root certificate from Sectigo expired on May, 30 2020. Due to the support of OpenSSL 1.0, the certificate chain ends up to AddTrust External CA Root instead, causing the certificate validation to fail.
Applies to the following Sophos products and versions Sophos UTM Sophos FirewallSophos Web Appliance
Depending on the Sophos product being used, users might run into an issue with websites not loading or SSL VPN failing to connect. Please refer to the linked articles below for more information:
Please follow the steps in the linked Knowledge Base articles.
This article will be updated when any new information becomes available.
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