When upgrading from Security Analytics 7.2.1 to 7.2.2, you may run into an issue where the cipher set becomes mismatched. This causes the sensors to lose their connection to the CMC. The sensor would show 'Not Connected' in the CMC dashboard.
Security Analytics 7.2.2 resolves a security vulnerability in the VPN connection that is used in CMC environments. Because of this change, sensors and CMCs that are running different versions of 7.2.x cannot communicate with each other until the attached security patch is applied, prior to upgrade. This patch modifies the VPN configuration so that all members of a CMC environment are using the same cipher set.
After the script has finished installing, you can upgrade the CMCs and their sensors according to your organization’s schedule; the CMCs and sensors will maintain connectivity across 7.2.x versions.