CVE-2017-5159

Name: CVE-2017-5159
Creator: NVD / NIST
Published: 2017-02-13T21:59:02.8+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.43%

Last modified Jun 17, 2026

CVE-2017-5159 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered on Phoenix Contact mGuard devices that have been updated to Version 8.4.0. When updating an mGuard device to Version 8.4.0 via the update-upload facility, the update will succeed, but it will reset the password of the admin user to its default value.. EPSS estimates a 2.43% chance of exploitation in the next 30 days.

Description

An issue was discovered on Phoenix Contact mGuard devices that have been updated to Version 8.4.0. When updating an mGuard device to Version 8.4.0 via the update-upload facility, the update will succeed, but it will reset the password of the admin user to its default value.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.43%

82.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-99

Affected Software

Vendor	Product	Versions
Phoenixcontact	Mguard Firmware	8.4.0

References

http://www.securityfocus.com/bid/95648Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-017-01Mitigation, Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/95648Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-017-01Mitigation, Third Party Advisory, US Government Resource

Timeline

Published: Feb 13, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-5159?

How severe is CVE-2017-5159?

CVE-2017-5159 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.43% probability of exploitation in the next 30 days.

How do I fix CVE-2017-5159?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-5159?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST