Government cyber agencies around the world are rushing to clamp down on what appears to be an advanced and sophisticated espionage campaign targeting popular security software used by remote workers.

Calling the threat "serious and urgent," Canada's Communication Security Establishment's (CSE) Centre for Cyber Security joined its international allies Thursday urging organizations to take immediate action to patch up vulnerabilities following a widespread hit on the technology security company Cisco.

The impacted technology is commonly used by organizations to enable virtual private networks, or VPN — a necessity for many remote workers.

Underscoring the breadth of the issue, CSE said its guidance is aimed at "critical infrastructure sectors, including municipal, provincial and territori

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