CCleaner App Gets Hacked and 2.3 Million Users Are Now Affected

If have the popular CCleaner app running on your Windows PC, you should go ahead and update it immediately. CCleaner’s parent company, Avast, has notified the public that hackers have managed to open a backdoor into the app. Avast believes that about 2.3 million users will have been affected by this backdoor exploit. So much for security software keeping you free of malware – yeh those were the good old days.

But Avast says that most users do not need to worry, since it appears to them that the hackers did not get to the second phase of their hack, and that CCleaner’s users’ data is most likely safe at this time.

“2.27 million is certainly a large number, so we’re not downplaying in any way. It’s a serious incident. But based on all the knowledge, we don’t think there’s any reason for users to panic,” Vlcek added. “To the best of our knowledge, the second-stage payload never activated… It was prep for something bigger, but it was stopped before the attacker got the chance.” He said Cisco Talos wasn’t the first to notify Avast of the issues, another unnamed third party was.

Furthermore, the hack specifically affected 32-bit computers only, and since most recent model PCs are running a 64-bit version of Windows, chances are that the hack really hasn’t had much impact.