CVE-2014-3931

Name: CVE-2014-3931
Creator: NVD / NIST
Published: 2017-03-31T16:59:00.237+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 26.57%

Last modified Jun 17, 2026

CVE-2014-3931 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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 has confirmed active exploitation in the wild. EPSS estimates a 26.57% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

26.57%

97.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jul 28, 2025.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Multi-Router Looking Glass Project	Multi-Router Looking Glass	<= 5.4.1

References

http://mrlg.op-sec.us/Third Party Advisory
http://www.s3.eurecom.fr/cve/CVE-2014-3931.txtThird Party Advisory
https://hackerone.com/reports/16330Exploit, Third Party Advisory
http://mrlg.op-sec.us/Third Party Advisory
http://www.s3.eurecom.fr/cve/CVE-2014-3931.txtThird Party Advisory
https://hackerone.com/reports/16330Exploit, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-3931US Government Resource

Timeline

Published: Mar 31, 2017
Last Modified: Jun 17, 2026
Status: Analyzed

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 score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 26.57% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2014-3931?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2014-3931?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST