Cisco Cisco Web Security Appliance S360

Each release is identified by the release type (ED - Early Deployment, GD - General Deployment, etc.) 
For an explanation of these terms, see 

. 

All virtual appliance models.

The following hardware models:

S170

S370

S670

S680

S380

http://www.cisco.com/c/en/us/support/docs/field-notices/638/fn63931.html

Before you start the upgrade process, see 

. 

You can upgrade to release 8.7.0-172 for AsyncOS for Cisco Web Security appliances from the 
following versions: 

7-7-0-500

7-7-0-608

7-7-0-706

7-7-0-710

7-7-0-725

7-7-0-736

7-7-0-744

7-7-0-753

7-7-0-757

7-7-0-760

7-7-0-761

7.7.5-190

7.7.5-194

7.7.5-195

7.7.5-302

7.7.5-311

8-0-0-408

8-0-0-503

8-0-5-075

8-0-5-079

8-0-5-082

8-0-6-053

8-0-6-078

8-0-6-101

8-0-6-119

8-0-7-142

8-1-0-235

8-1-0-245

8-5-0-389

8-5-0-390

8-5-0-476

8-5-0-518

8-5-1-019

8-5-1-021

8-6-0-025

8-7-0-141