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Vulnerabilities

Vulnerability · CVE-2014-3931

Multi-Router Looking Glass (MRLG) Buffer Overflow Vulnerability

Published Mar 31, 2017 · catalog updated Jun 16, 2026 · Looking Glass Multi-Router Looking Glass (MRLG)

Patch now

CVE-2014-3931 is in the CISA known-exploited catalog, due Jul 28, 2025. Confirm Looking Glass Multi-Router Looking Glass (MRLG) against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
28.98%
Remediation
Remediation guidance
Affected products
cpe multi-router looking glass project/multi-router looking glass · vendor Looking Glass Multi-Router Looking Glass (MRLG) · vendor n/a n/a

Multi-Router Looking Glass (MRLG) contains a buffer overflow vulnerability that could allow remote attackers to cause an arbitrary memory write and memory corruption.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe multi-router looking glass project/multi-router looking glassversion unspecified
  • vendor Looking Glass Multi-Router Looking Glass (MRLG)version unspecified
  • vendor n/a n/aversion unspecified

How to fix CVE-2014-3931

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2014-3931 is in the CISA known-exploited catalog, due Jul 28, 2025. Confirm Looking Glass Multi-Router Looking Glass (MRLG) against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-119: Buffer Overflow. EPSS 28.98%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 31, 2017 · Catalog

    Detected

    Multi-Router Looking Glass (MRLG) contains a buffer overflow vulnerability that could allow remote attackers to cause an arbitrary memory write and memory corruption.

  2. Jul 7, 2025 · CISA KEV

    Known exploited

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

  3. Jul 28, 2025 · CISA KEV

    Remediation due

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

  4. Jun 16, 2026 · Catalog

    Updated

    Multi-Router Looking Glass (MRLG) contains a buffer overflow vulnerability that could allow remote attackers to cause an arbitrary memory write and memory corruption.

Sources

  • CISA KEVConfirmed exploitationCVE-2014-3931

    Multi-Router Looking Glass (MRLG) contains a buffer overflow vulnerability that could allow remote attackers to cause an arbitrary memory write and memory corruption.

    cisa.gov
  • CVE.orgVulnerability recordCVE-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.

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2014-3931

    30-day exploitation probability 29.0%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2014-3931

    Multi-Router Looking Glass (MRLG) contains a buffer overflow vulnerability that could allow remote attackers to cause an arbitrary memory write and memory corruption.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.