# CVE-2014-3931: Multi-Router Looking Glass (MRLG) Buffer Overflow Vulnerability

> CVE-2014-3931: Multi-Router Looking Glass (MRLG) Buffer Overflow Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2014-3931
Last updated: 2025-10-21T23:55:43Z

- Published: 2017-03-31 15:00 UTC · Updated: 2025-10-21 23:55 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 29.0%, 98th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-07-07, federal due date 2025-07-28, ransomware use: Unknown

## 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.

## CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- Looking Glass: Multi-Router Looking Glass (MRLG)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2014-3931)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2014-3931)
- [http://mrlg.op-sec.us/](http://mrlg.op-sec.us/)
- [https://hackerone.com/reports/16330](https://hackerone.com/reports/16330)
- [http://www.s3.eurecom.fr/cve/CVE-2014-3931.txt](http://www.s3.eurecom.fr/cve/CVE-2014-3931.txt)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2014-3931 · Markdown: https://rewindex.com/cve/CVE-2014-3931.md · JSON: https://rewindex.com/api/v1/cves/CVE-2014-3931 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T01:58:50.282Z