Security Update for mGuard Software

Number: AV17-008
Date: 19 January 2017


The purpose of this advisory is to bring attention to a recently discovered vulnerability in Phoenix Contact’s mGuard software.


The most recent software update provided by Phoenix Contact for its mGuard product, changes the password to factory default during installation. This vulnerability allows for low skill level remote exploitation.

CVE Reference: CVE-2017-5159

Versions affected:

Only devices that have been updated to Version 8.4.0 are affected.

Suggested action

CCIRC recommends that owner/operators test and deploy the vendor-released update to the affected application accordingly.


Note to Readers

In support of Public Safety's mission to build a safe and resilient Canada, CCIRC's mandate is to help ensure the security and resilience of the vital non-federal government cyber systems that underpin Canada's national security, public safety and economic prosperity. As Canada's computer security incident response team, CCIRC is Canada's national coordination centre for the prevention and mitigation of, preparedness for, response to, and recovery from cyber incidents on non-federal government systems. It does this by providing authoritative advice and support, and coordinating information sharing and incident response.

Please note, CCIRC PGP key has recently been updated.

For general information, please contact Public Safety Canada's Public Affairs division at:

Telephone: 613-944-4875 or 1-800-830-3118
Fax: 613-998-9589

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