CVE-2014-3931
CVE-2014-3931 is a critical-severity vulnerability in Multi-router Looking Glass Project Multi-router Looking Glass with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-07-07). The underlying weakness is classified as CWE-119.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 27% (98th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2025-07-07)
- EU (EUVD) id: EUVD-2014-3868
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-07-07)
- Weakness: CWE-119
- Affected product: Multi-router Looking Glass Project Multi-router Looking Glass
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2014-3931?
- 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.
- How severe is CVE-2014-3931?
- CVE-2014-3931 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2014-3931 being actively exploited?
- Yes. CVE-2014-3931 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-07-07, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2014-3931?
- CVE-2014-3931 affects Multi-router Looking Glass Project Multi-router Looking Glass. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2014-3931?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2014-3931 have an EU (EUVD) identifier?
- Yes. CVE-2014-3931 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2014-3868. It is also flagged as exploited in the EUVD (since 2025-07-07).
- When was CVE-2014-3931 published?
- CVE-2014-3931 was published on 2017-03-31 and last updated on 2026-06-17.
References
- http://mrlg.op-sec.us/
- http://www.s3.eurecom.fr/cve/CVE-2014-3931.txt
- https://hackerone.com/reports/16330
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-3931
Affected products (1)
- cpe:2.3:a:multi-router_looking_glass_project:multi-router_looking_glass:*:*:*:*:*:*:*:*
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