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CVE-2017-7937

17
FAUCET Score

CVE-2017-7937 describes an Improper Authentication vulnerability in Phoenix Contact GmbH mGuard firmware versions 8.3.0 through 8.4.2. This flaw allows an attacker to gain unauthorized access to the user firewall if RADIUS authentication servers are unreachable. The vulnerability has a CVSS score of 4.0 (Medium), indicating a network-based attack with high complexity, but only a low impact on integrity and no impact on confidentiality or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
8.3.0CPE matchmatch criteria
cpe:2.3:o:phoenix_contact_gmbh:mguard_firmware:8.3.0:*:*:*:*:*:*:*
8.3.1CPE matchmatch criteria
cpe:2.3:o:phoenix_contact_gmbh:mguard_firmware:8.3.1:*:*:*:*:*:*:*
8.3.2CPE matchmatch criteria
cpe:2.3:o:phoenix_contact_gmbh:mguard_firmware:8.3.2:*:*:*:*:*:*:*
8.4.0CPE matchmatch criteria
cpe:2.3:o:phoenix_contact_gmbh:mguard_firmware:8.4.0:*:*:*:*:*:*:*
8.4.1CPE matchmatch criteria
cpe:2.3:o:phoenix_contact_gmbh:mguard_firmware:8.4.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.0MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.71%
Probability of exploitation in next 30 days
EPSS Percentile
49.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0071 is in the 10th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ics-cert.us-cert.gov / advisories/ICSA-17-131-01
Third Party AdvisoryUS Government Resource