Cisco Email Security Appliance (ESA) / Cisco Secure Email Gateway

 

AsyncOSRelease TypeRelease Date
AsyncOS 13.0.0 for Cisco Email Security Appliances GD (General Deployment) 2020-02-03
AsyncOS 13.0.1 for Cisco Email Security Appliances MD (Maintenance Deployment) 2020-05-28
AsyncOS 13.0.2 for Cisco Email Security Appliances MD (Maintenance Deployment) 2020-10-23
AsyncOS 13.0.5 for Cisco Email Security Appliances MD (Maintenance Deployment) 2022-06-30
AsyncOS 13.5.1 for Cisco Email Security Appliances GD (General Deployment) 2020-06-12
AsyncOS 13.5.2 for Cisco Email Security Appliances MD (Maintenance Deployment) 2020-09-25
AsyncOS 13.5.3 for Cisco Email Security Appliances MD (Maintenance Deployment) 2021-01-20
AsyncOS 13.5.4 for Cisco Email Security Appliances MD (Maintenance Deployment) 2021-11-03
AsyncOS 14.0.0 for Cisco Secure Email Gateway GD (General Deployment) 2021-06-14
AsyncOS 14.0.1 for Cisco Secure Email Gateway MD (Maintenance Deployment) 2021-08-25
AsyncOS 14.0.2 for Cisco Secure Email Gateway MD (Maintenance Deployment) 2022-01-18
AsyncOS 14.2.0 for Cisco Secure Email Gateway GD (General Deployment) 2022-05-27
AsyncOS 14.2.1 for Cisco Secure Email Gateway MD (Maintenance Deployment) 2022-09-21
AsyncOS 14.2.2 for Cisco Secure Email Gateway MD (Maintenance Deployment) 2023-02-16
AsyncOS 14.2.3 for Cisco Secure Email Gateway MD (Maintenance Deployment) 2023-11-02
AsyncOS 15.0.0 for Cisco Secure Email Gateway GD (General Deployment) 2023-08-10
AsyncOS 15.0.1 for Cisco Secure Email Gateway MD (Maintenance Deployment) 2023-11-22
AsyncOS 15.0.2 for Cisco Secure Email Gateway MD (Maintenance Deployment) 2024-06-06
AsyncOS 15.5.1 for Cisco Secure Email Gateway GD (General Deployment) 2024-04-30
     

 

Note:
[Release Notes]
 https://www.cisco.com/c/en/us/support/security/email-security-appliance/products-release-notes-list.html

[Release Terminology]
 https://www.cisco.com/c/dam/en/us/products/collateral/security/web-security-appliance/content-security-release-terminology.pdf