CVE-2017-7937 json
An Improper Authentication issue was discovered in Phoenix Contact GmbH mGuard firmware versions 8.3.0 to 8.4.2.
published 2017-05-19 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-16908
- cvss
- 4.0
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
An Improper Authentication issue was discovered in Phoenix Contact GmbH mGuard firmware versions 8.3.0 to 8.4.2. An attacker may be able to gain unauthorized access to the user firewall when RADIUS servers are unreachable.
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-17-131-01 updated cvss 4.0
PHOENIX CONTACT mGuard
-
PHOENIX CONTACT, Innominate Security Technologies mGuard >= 8.3.0, <= 8.4.2affected: mitigation “PHOENIX CONTACT recommends that users upgrade to firmware Version 8.5.0, or higher, to mitigate the vulnerabilities.”
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
0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 4.0 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- n/a Phoenix Contact GmbH mGuard
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
ics-cert.us-cert.gov
/advisories/ICSA-17-131-01
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2017-7937
- NVD CVE-2017-7937
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