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CVE-2014-3931

Multi-Router Looking Glass (MRLG) Buffer Overflow

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 29.0%
  1. Published31 Mar 2017
  2. Added to CISA KEV7 Jul 2025
  3. Remediation due28 Jul 2025
Actively exploited (CISA KEV)

Multi-Router Looking Glass (MRLG) contains a buffer overflow vulnerability that could allow remote attackers to cause an arbitrary memory write and memory corruption.

Added to KEV: 7 Jul 2025Federal remediation due: 28 Jul 2025

Description

fastping.c in MRLG (aka Multi-Router Looking Glass) before 5.5.0 allows remote attackers to cause an arbitrary memory write and memory corruption.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Multi-router Looking Glass Project Multi-router Looking Glass≤ 5.4.1

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2014-3931 being actively exploited?

Yes. CVE-2014-3931 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 7 Jul 2025.

How severe is CVE-2014-3931?

CVE-2014-3931 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 29.0% probability of exploitation.

Which products are affected by CVE-2014-3931?

Affected products include Multi-router Looking Glass Project Multi-router Looking Glass.

How do I fix CVE-2014-3931?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2014-3931 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.