No exploitation reported

CVE-2017-5159

No exploitation reported by the sources we read.

Published2017-02-13
WeaknessCWE-99

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2017-02-1321:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-5159?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-5159?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Phoenixcontact mguard firmware

Branch	Affected	Fixed in	Source
8.4	= 8.4.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-17-017-01 CISA1 known affected
PHOENIX CONTACT mGuard
mGuard: Only devices that have been updated to Version 8.4.0 are affected

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-17-017-01 · 1 productPHOENIX CONTACT recommends users update to Version 8.4.1 (or higher, if applicable). If an update to Version 8.4.0 already has been performed, please change the “admin” password via WebUI or command line. If SSH or HTTPS access was possible from untrusted sources after an update to Version 8.4.0, p…
Mitigation from the vendor CISA ICSA-17-017-01 · 1 productTo 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.

Advisories and patches

ics-cert.us-cert.govMitigation

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-99read 2026-10-23
FIRST EPSSEPSS score2.4 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2017-02-13
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-5159?

Is CVE-2017-5159 actively exploited?

Active exploitation of CVE-2017-5159 has not been confirmed. Its EPSS score was 2.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-5159?

CVE-2017-5159 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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