Confirmed on Cisco Secure Client version 5.1.0.136
re: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwc70093
The tunnel security reinforcement on Linux upon virtual adaptor detection impacts later versions as well. I've tested this on a Cisco Secure Client version 5.1.0.136 and can confirm the same results.
I have also created this gist for a reproducer:
I would really appreciate if this issue is resolved as it's harming our productivity.
