That is not a comfortable position to be in at all. About 100 email addresses have been outed by hackers who attached the International Atomic Energy Agency. But it may not be too bad, as it’s outdated information, as the IAEA claimed the addresses were “stolen from an old server that was shut down some time ago.”
As for the identity of the aggressors? A hacker group known as Parastoo has claimed responsibility for the intrusion and released the full list of email addresses via Pastebin, expressing their purpose of the breach was to shed light on Israel’s nuclear weapons program(s). Keep in mind Israel has kept their atomic arsenal under wraps, with some wondering if it exists simply as a trump card bluff. The IAEA is continuing to investigate and patch their systems.