It appears that even the CEO of Facebook, the biggest social networking site in the world, is not immune to hackers.

Mark Zuckerberg, the 32-year old billionaire and co-founder of Facebook, made breaking news this week after his social media accounts got compromised by a hacker group from Saudi Arabia known as OurMine.

According to the hacker group, they were able to hack into Zuckerberg’s accounts through the recent LinkedIn data breach which revealed his account credentials.

In their Twitter account, OurMine tweeted that they simply took Zuckerberg’s SHA1-hashed password string and then broke it and tried it on several social media accounts.

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The group was then able to successfully hack into Zuckerberg’s Twitter and Pinterest profile wherein in they posted few offensive tweets and defaced his banners with their logo.

OurMine then revealed that Zuckerberg’s LinkedIn password was “dadada”, a totally unsecured password that he seemingly uses for his other online accounts.

However, despite their claims of having broken into Zuckerberg’s Instagram account, a spokesperson from Facebook has denied allegations saying that Zuckerberg’s Instagram account was not compromised.

“No Facebook systems or accounts were accessed. The affected accounts have been re-secured,” Facebook’s spokesperson added.

This incident has become a wakeup call for social networking site to boost their online security as well for their users to improve their password security. Hopefully, this incident will serve as lesson for everyone to secure their social media accounts.

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*The offensive posts and changes made by the hackers on Zuckerberg’s Twitter account and Pinterest profile have been removed.