CVE-2014-3931
Multi-Router Looking Glass (MRLG) Buffer Overflow Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 28 July 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 28.98% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 7 July 2025 · due 28 July 2025
- Weakness
- CWE-119
- Affected
- multi-router looking glass project/multi-router looking glass
- Source
- cve@mitre.org
EPSS 29.0% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://mrlg.op-sec.us/ ; https://nvd.nist.gov/vuln/detail/CVE-2014-3931
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.