If you are to believe Anthropic, Fable was export controlled for bug finding, not for exploit construction. They seem to be working to make this the "bright line" for LLMs being a national security risk. My guess is that will be the case they take to Washington this week.
This is why responsible/coordinated disclosure exists in the first place.
The factory does decent software engineering - for which it can also use the same llm - so that when an attacker does either, a sota llm does not find bugs to exploit.