Alert - Vulnerabilities exploited in VPN products used worldwide (NCSC Alert)

Number: AL19-017
Date: 3 October 2019


This Alert is intended for IT professionals and managers of notified organizations.


An Alert is used to raise awareness of a recently identified cyber threat that may impact cyber information assets, and to provide additional detection and mitigation advice to recipients. The Canadian Centre for Cyber Security ("Cyber Centre") is also available to provide additional assistance regarding the content of this Alert to recipients as requested.


The National Cyber Security Centre (NCSC), the United Kingdom’s independent authority on Cyber Security, has produced an Alert regarding their ongoing investigation of known vulnerabilities affecting a number of VPN products, dated 2 October 2019. The Cyber Centre would like to highlight this Alert as it provides valuable information to system owners and operators responsible for defending their systems and networks from cyber threats. The Cyber Centre previously reported on these vulnerabilities in September 2019; the NCSC report contains additional and updated information.

The NCSC Alert can be found at:

Should activity matching the content of either of these Alerts be discovered, recipients are encouraged to contact the Cyber Centre by email ( or by telephone (1-833-CYBER-88 or 1-833-292-3788).


Cyber Centre Alert on Active Exploitation of VPN Vulnerabilities (AL19-016):


The Canadian Centre for Cyber Security (Cyber Centre) operates as part of the Communications Security Establishment. We are Canada's national authority on cyber security and we lead the government's response to cyber security events. As Canada's national computer security incident response team, the Cyber Centre works in close collaboration with government departments, critical infrastructure, Canadian businesses and international partners to prepare for, respond to, mitigate, and recover from cyber events. We do this by providing authoritative advice and support, and coordinating information sharing and incident response. The Cyber Centre is outward-facing, welcoming partnerships that help build a stronger, more resilient cyber space in Canada.

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