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Fencer Intel
critical 9.8

CVE-2017-5159 json

An issue was discovered on Phoenix Contact mGuard devices that have been updated to Version 8.4.0.

published 2017-02-13 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-14268

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-17-017-01 updated cvss 9.8

PHOENIX CONTACT mGuard

  • PHOENIX CONTACT, Innominate Security Technologies mGuard 8.4.0
    affected: mitigation “To view the advisory published by PHOENIX CONTACT, navigate to the product page on www.phoenixcontact.com and then find the document in the “various” section of the product download page.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.43% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • n/a Phoenix Contact mGuard 8.4.0

Classification

Weakness
  • CWE-99 Improper Control of Resource Identifiers

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.