Actively exploited · Published Mar 31, 2017 · Assigned by mitre

CVE-2014-3931

Critical 9.8 Exploited

In plain English

A critical-severity memory corruption in Multi-Router Looking Glass (MRLG) from Looking Glass. Attackers are actively exploiting it in the wild (listed by CISA on July 7, 2025). The chance it is exploited in the next 30 days is estimated at 29.0% (higher than 98% of all known vulnerabilities). Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)29.0%top 1.8% of all CVEs

Exploited in the wildYesCISA KEV since Jul 7, 2025

Attack toolingNoneno public tooling known

CISA guidance

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

Federal agencies must remediate by Jul 28, 2025.

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

Weakness: CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

http://mrlg.op-sec.us/ x_refsource_CONFIRM
http://www.s3.eurecom.fr/cve/CVE-2014-3931.txt x_refsource_MISC
https://hackerone.com/reports/16330 x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-3931 government-resource