[INFO] Does Cacti Support snmpV3 and AES192 or AES256 - YES!!

[TheWitness]

Hi all. I am still struggling with V3, new install Net-SNMP 5.8, Ubuntu 20 and Cacti ver 1.2.20. I can query a V3 device with: snmpwalk -v3 -a sha -A 'PASSWORD' -3x aes -X 'PASSWORD' -u "USERNAME" "IP ADDRESS OF ROUTER".
That works fine. When i do a debug of cmd.php i get the following error: Invalid privacy protocol specified after -3x flag: AES256.
It seems that cacti somehow "adds" the 256 after the -3x flag and the router does not like it as when i change the 1st query and add 256 after the aes i get a failed query.
What can i go and edit to prevent cacti to add the '256'? I have disabled the php-snmp module as it does not work either.

Upgrade to 1.2.21 and ensure php-snmp is Uninstalled.