NetBackup Appliance 188.8.131.52 Maintenance Release 1 (MR1) is now available at the following link:
MR1 includes 4.0 GA and NetBackup 184.108.40.206 content
3.2/220.127.116.11 customers can upgrade directly to MR1 in a single upgrade step
Pre-3.2 customers will need to first upgrade to 3.2/18.104.22.168/4.0 and then upgrade to MR1
All 4.0 customers are strongly recommended to install MR1 as soon as possible as it contains critical product and security fixes.