(UPDATED APRIL 2021) – As the link was broken and now fixed) I don’t know why this isn’t plastered on cisco.com, but you can go to here and throw a serial number in and see if it’s affected by the timebomb that the C2000 CPU’s cause. This seems specific to the 5506x, there are other search tools and field notices at cisco to determine if your hardware is affected.
https://snvui.cisco.com/snv/FN64228
If you need to grab your SN, type show inv and it’ll spit out SN and version. I’ve found a bunch of V02 are unaffected, based on that lookup tool.
madfw5# show inv
Name: "Chassis", DESCR: "ASA 5506-X with FirePOWER services, 8GE, AC, DES"
PID: ASA5506 , VID: V04 , SN: JMX2xxxxxx
Name: "Storage Device 1", DESCR: "ASA 5506-X SSD"
PID: ASA5506-SSD , VID: N/A , SN: MSAxxxxxxxx
madfw5#