Updated

Systems that control the elevators, lights, ventilation, and fire alarms in federal buildings are vulnerable to cyberattacks that could compromise security or result in serious harm to government workers.

In a report released within hours of high-profile social media hacks at U.S. Central Command, the Government Accountability Office said homeland security officials have little understanding of the risks presented by Internet-based control systems and don’t have a clear strategy for dealing with an attack if one were to occur.

The congressional watchdog is worried that cyberattacks on the access and control systems of federal buildings could “damage the government’s credibility.”

Such attacks could allow outsiders to access restricted federal buildings or result in death if fire alarms and sprinklers were switched off during a blaze, the report said.

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