It's hard to prove intent.

If there's a history of these execs selling similar amounts of stock in other quarters, then it's probably not insider trading.

If the paperwork trail started an hour after the first meeting where they learned about the breach, and they had never sold stock before, then it's probably insider trading.

Since the truth is somewhere in between, it's hard to say. It's hard to believe that these people didn't recognize the optics of what they were doing. But, that's why we have investigators and courts.