The weekend breach of Hacking Team left Adobe Flash vulnerable to attack.

Adobe released a patch for the bug on Wednesday, which covers Flash Player for Windows, Macintosh and Linux. "These updates address critical vulnerabilities that could potentially allow an attacker to take control of the affected system," Adobe said.

Italy-based Hacking Team over the weekend revealed that its systems had been breached, and 400GB of sensitive data published online. The firm has a questionable reputation, as it provides governments around the world with software that allows them to spy on citizens. The document dump revealed that Hacking Team has worked with the U.S., but also repressive regimes like Sudan.

But the document dump also gave hackers a handy how-to guide for some dangerous exploits. In a Tuesday blog post, Malwarebytes pointed to a Flash Player zero day, which scammers quickly put into action. "This is one of the fastest documented case of an immediate weaponization in the wild, possibly thanks to the detailed instructions left by Hacking Team," Malwarebytes said in a follow-up post.

Hacking Team, meanwhile, told ZDNet that the attack on its system was "sophisticated" and that it knows how it happened, but declined to elaborate. According to Motherboard, a hacker known as Phineas has taken responsibility, though Hacking Team chief marketing officer Eric Rabe told ZDNet that "we don't believe it was a guy alone in his basement."