Is CVE-2014-3931 exploited in the wild?

Yes. CVE-2014-3931 is known to be exploited in the wild, first recorded on 7 July 2025. Treat it as urgent.

How severe is CVE-2014-3931?

Critical severity, with a CVSS score of 9.8, published 7 July 2025.

Which products and versions are affected?

Multi-Router Looking Glass Project Multi-Router Looking Glass before 5.5.0.

Is there a fix for CVE-2014-3931?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2014-3931 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2014-3931?

Check whether you run Looking Glass Multi-Router Looking Glass (MRLG) or Multi-Router Looking Glass Project Multi-Router Looking Glass at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2014-3931: Multi-Router Looking Glass buffer overflow in fastping.c

CVE-2014-3931 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2025-07-07

Multi-Router Looking Glass (MRLG), a tool used by network administrators to view routing information from various network devices, contains a critical security flaw. An attacker can exploit this vulnerability remotely to corrupt the system's memory, potentially leading to a complete takeover of the server. This could allow unauthorized access to sensitive network topology data or disrupt network monitoring operations.

Quick answers

Is CVE-2014-3931 exploited in the wild?: Yes. CVE-2014-3931 is known to be exploited in the wild, first recorded on 7 July 2025. Treat it as urgent.
How severe is CVE-2014-3931?: Critical severity, with a CVSS score of 9.8, published 7 July 2025.
Which products and versions are affected?: Multi-Router Looking Glass Project Multi-Router Looking Glass before 5.5.0.
Is there a fix for CVE-2014-3931?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2014-3931 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2014-3931?: Check whether you run Looking Glass Multi-Router Looking Glass (MRLG) or Multi-Router Looking Glass Project Multi-Router Looking Glass at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A buffer overflow vulnerability exists in the fastping.c component of Multi-Router Looking Glass (MRLG) prior to version 5.5.0. The flaw is classified as CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). A remote, unauthenticated attacker can exploit this by sending specially crafted requests to the application, leading to arbitrary memory writes and memory corruption. This can result in remote code execution (RCE) with the privileges of the MRLG process. The vulnerability has been observed being exploited in the wild and is included in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Affected products

Multi-Router Looking Glass Project Multi-Router Looking Glass (MRLG) before 5.5.0

Timeline

2017-03-31: advisory: NVD Published Date
2025-07-07: kev added: Added to CISA KEV catalog
2025-07-07: exploited: Confirmed active exploitation by CISA

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