Secure Email Incident - 2025-10-19

What:
McAfee service fails to start as expected on ESA devices running 14.x and 15.x.

Impact:
Email processing is delayed or halted.

Symptoms:
McAfee-related errors are observed in the mail logs.

Workaround/Solution:

• Resolution: Upgrade AsyncOS to version 16.0.3
• Temporary Workaround: Revert the DAT file via the GUI:
  • Navigate to Security Services > Services Overview.
  • Click Change next to McAfee.
  • Select a DAT file dated October 18th or earlier.

Recommendations:

It is recommended that you contact Cisco TAC if you encounter these errors so we can assist you with resolving the issue.

If you have any urgent questions about this incident or the possible impact, please get in touch with Cisco TAC: http://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html