Cisco Email Security Appliance (ESA) #C-Series

 

AsyncOSRelease TypeRelease Notes
Published / Revised
AsyncOS 11.0.0 for Cisco Email Security Appliances GD (General Deployment) November 9, 2017
AsyncOS 11.0.1 for Cisco Email Security Appliances MD (Maintenance Deployment) February 15, 2018
AsyncOS 11.0.2 for Cisco Email Security Appliances MD (Maintenance Deployment) October 30, 2018
AsyncOS 11.0.3 for Cisco Email Security Appliances MD (Maintenance Deployment) September 05, 2019
AsyncOS 11.0.4 for Cisco Email Security Appliances MD (Maintenance Deployment) March 24, 2021
AsyncOS 11.1.0 for Cisco Email Security Appliances GD (General Deployment) August 17, 2018
AsyncOS 11.1.1 for Cisco Email Security Appliances MD (Maintenance Deployment) October 04, 2018
AsyncOS 11.1.2 for Cisco Email Security Appliances MD (Maintenance Deployment) November 29, 2018
AsyncOS 11.1.3 for Cisco Email Security Appliances MD (Maintenance Deployment) July 8, 2019
AsyncOS 11.5 for Cisco Email Security Appliances
(Upgrade paths are not available as this is a manufacturing release for x95 platforms.)
  June 07, 2019
AsyncOS 12.0 for Cisco Email Security Appliances GD (General Deployment) March 26, 2019
AsyncOS 12.1 for Cisco Email Security Appliances GD (General Deployment) June 20, 2019
AsyncOS 12.5.0 for Cisco Email Security Appliances GD (General Deployment) December 16, 2019
AsyncOS 12.5.1 for Cisco Email Security Appliances MD (Maintenance Deployment) December 16, 2019
AsyncOS 12.5.2 for Cisco Email Security Appliances MD (Maintenance Deployment) April 2, 2020
AsyncOS 12.5.3 for Cisco Email Security Appliances MD (Maintenance Deployment) March 3, 2021
AsyncOS 13.0.0 for Cisco Email Security Appliances GD (General Deployment) February 3, 2020
AsyncOS 13.0.1 for Cisco Email Security Appliances MD (Maintenance Deployment) May 28, 2020
AsyncOS 13.0.2 for Cisco Email Security Appliances MD (Maintenance Deployment) November 9, 2020
AsyncOS 13.0.3 for Cisco Email Security Appliances MD (Maintenance Deployment) March 15, 2021
AsyncOS 13.0.4 for Cisco Email Security Appliances MD (Maintenance Deployment) July 26, 2021
AsyncOS 13.5 for Cisco Email Security Appliances LD (Limited Deployment) March 19, 2020
AsyncOS 13.5.1 for Cisco Email Security Appliances GD (General Deployment) September 1, 2020
AsyncOS 13.5.2 for Cisco Email Security Appliances MD (Maintenance Deployment) September 30, 2020
AsyncOS 13.5.3 for Cisco Email Security Appliances MD (Maintenance Deployment) February 1, 2021
AsyncOS 13.5.4 for Cisco Email Security Appliances MD (Maintenance Deployment) June 16, 2021
AsyncOS 13.7 for Cisco Email Security Appliances GD (General Deployment) February 18, 2021
AsyncOS 14.0 for Cisco Secure Email Gateway GD (General Deployment) July 1, 2021
     

 

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