The US Government have warned that hackers are attempting to exploit the 'Heartbleed' bug by scanning networks to see if they are vulnerable, saying they could now "exploit unpatched systems".
Larry Zelvin, a Department of Homeland Security official who runs an agency centre that monitors and responds to emerging cyber threats said on his White House blog:
"While there have not been any reported attacks or malicious incidents involving this particular vulnerability at this time, it is still possible that malicious actors in cyberspace could exploit unpatched systems."
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