Cisco Email Security Appliance (ESA) #C-Series
| AsyncOS | Release Type | Release Notes Published / Revised |
|---|---|---|
| AsyncOS 10.0.0 for Cisco Email Security Appliances | GD (General Deployment) | October 6, 2016 |
| AsyncOS 10.0.1 for Cisco Email Security Appliances | MD (Maintenance Deployment) | April 10, 2017 |
| AsyncOS 10.0.2 for Cisco Email Security Appliances | MD (Maintenance Deployment) | September 04, 2017 |
| AsyncOS 10.0.3 for Cisco Email Security Appliances | MD (Maintenance Deployment) | February 15, 2018 |
| 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) | January 31, 2019 |
| 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 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 13.5 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 13.7 for Cisco Email Security Appliances | LD (Limited Deployment) | December 3, 2020 |
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
