Download Firmware Cisco ESA AsyncOS 11.1 HP4 / 11.0.2 HP1

Cisco has released two firmware updates for its Email Security Appliance‘s, which are abbreviated to ESA. The technology comes from IronPort Systems, which was bought by Cisco in 2007. Although that was more than a decade ago, you still hear the name IronPort for these appliances. For the supported upgrade paths, it is recommended to read the documentation or contact Cisco’s TAC. The firmware is called 11.1 Hot Patch 4 and 11.0.2 Hot Patch 1, and has 11.1.0-143 and 11.0.2-038 as exact version numbers, respectively. The lists of changes refer to Cisco’s bug database:

Version 11.1 Hot Patch 4
Known Issues
Fixed Issues

Version 11.0.2 Hot Patch 1
Known Issues
Fixed Issues