ASDM not working with Java 8 with window 7

[Harry McClaine]

The corporation I work for just rolled out Java 8 and since then the version of ASDM I was running (733 up to 751) is not launching with Java 8.

Any suggestions?

[Marvin Rhoads]

Modify your Java security settings to trust the certificates presented by your ASAs and/or ignore Cisco's code-signing issues. More details are in the ASDM Release Notes.

Default Java installation settings will indeed break ASDM. However, with tweaking, I use Java 8 on dozens of ASAs.

I keep my Java updates current via manual upgrades and am careful to reject Oracle's suggestion / default settings to "enhance" my Java security settings.