CVE-2014-3931

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-07-07), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 27%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(high)
EPSS
97.8%
KEV
⚠ Exploited

Published

March 31, 2017

Last Modified

April 21, 2026

Advisory Details (3)

Auto-updated Apr 30, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-3931
generic

HackerOne

https://hackerone.com/reports/16330
generic

mrlg

http://mrlg.op-sec.us/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 90× in last 7d / 402× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 546 total refreshes for this CVE.

  1. 2026-07-07 14:48 UTCEG score recompute
  2. 2026-07-07 14:48 UTCGHSA enrichment
  3. 2026-07-07 10:48 UTCEG score recompute
  4. 2026-07-07 10:48 UTCGHSA enrichment
  5. 2026-07-07 06:47 UTCEG score recompute
  6. 2026-07-07 06:46 UTCGHSA enrichment
  7. 2026-07-07 02:45 UTCEG score recompute
  8. 2026-07-07 02:45 UTCGHSA enrichment
  9. 2026-07-06 22:45 UTCEG score recompute
  10. 2026-07-06 22:45 UTCGHSA enrichment
  11. 2026-07-06 18:46 UTCEG score recompute
  12. 2026-07-06 18:46 UTCGHSA enrichment
  13. 2026-07-06 16:24 UTCEPSS rescore
  14. 2026-07-06 14:46 UTCEG score recompute
  15. 2026-07-06 14:46 UTCGHSA enrichment
  16. 2026-07-06 10:46 UTCEG score recompute
  17. 2026-07-06 10:46 UTCGHSA enrichment
  18. 2026-07-06 06:39 UTCEG score recompute
  19. 2026-07-06 06:39 UTCGHSA enrichment
  20. 2026-07-06 02:40 UTCEG score recompute
  21. 2026-07-06 02:39 UTCGHSA enrichment
  22. 2026-07-05 22:40 UTCEG score recompute
  23. 2026-07-05 22:40 UTCGHSA enrichment
  24. 2026-07-05 18:41 UTCEG score recompute
  25. 2026-07-05 18:41 UTCGHSA enrichment
Show 75 more
  1. 2026-07-05 14:41 UTCEG score recompute
  2. 2026-07-05 14:41 UTCGHSA enrichment
  3. 2026-07-05 10:41 UTCEG score recompute
  4. 2026-07-05 10:40 UTCGHSA enrichment
  5. 2026-07-05 06:41 UTCEG score recompute
  6. 2026-07-05 06:40 UTCGHSA enrichment
  7. 2026-07-05 02:40 UTCEG score recompute
  8. 2026-07-05 02:40 UTCGHSA enrichment
  9. 2026-07-05 02:26 UTCEPSS rescore
  10. 2026-07-04 22:41 UTCEG score recompute
  11. 2026-07-04 22:41 UTCGHSA enrichment
  12. 2026-07-04 18:41 UTCEG score recompute
  13. 2026-07-04 18:41 UTCGHSA enrichment
  14. 2026-07-04 14:42 UTCEG score recompute
  15. 2026-07-04 14:42 UTCGHSA enrichment
  16. 2026-07-04 10:42 UTCEG score recompute
  17. 2026-07-04 10:42 UTCGHSA enrichment
  18. 2026-07-04 06:39 UTCEG score recompute
  19. 2026-07-04 06:38 UTCGHSA enrichment
  20. 2026-07-04 06:27 UTCEPSS rescore
  21. 2026-07-04 02:36 UTCEG score recompute
  22. 2026-07-04 02:36 UTCGHSA enrichment
  23. 2026-07-03 22:34 UTCEG score recompute
  24. 2026-07-03 22:34 UTCGHSA enrichment
  25. 2026-07-03 18:35 UTCEG score recompute
  26. 2026-07-03 18:35 UTCGHSA enrichment
  27. 2026-07-03 14:36 UTCEG score recompute
  28. 2026-07-03 14:36 UTCGHSA enrichment
  29. 2026-07-03 10:37 UTCEG score recompute
  30. 2026-07-03 10:37 UTCGHSA enrichment
  31. 2026-07-03 06:35 UTCEG score recompute
  32. 2026-07-03 06:34 UTCGHSA enrichment
  33. 2026-07-03 02:34 UTCEG score recompute
  34. 2026-07-03 02:34 UTCGHSA enrichment
  35. 2026-07-02 22:35 UTCEG score recompute
  36. 2026-07-02 22:35 UTCGHSA enrichment
  37. 2026-07-02 18:36 UTCEG score recompute
  38. 2026-07-02 18:35 UTCGHSA enrichment
  39. 2026-07-02 14:35 UTCEG score recompute
  40. 2026-07-02 14:35 UTCGHSA enrichment
  41. 2026-07-02 10:36 UTCEG score recompute
  42. 2026-07-02 10:36 UTCGHSA enrichment
  43. 2026-07-02 06:36 UTCEG score recompute
  44. 2026-07-02 06:36 UTCGHSA enrichment
  45. 2026-07-02 02:35 UTCEG score recompute
  46. 2026-07-02 02:35 UTCGHSA enrichment
  47. 2026-07-01 22:35 UTCEG score recompute
  48. 2026-07-01 22:35 UTCGHSA enrichment
  49. 2026-07-01 19:16 UTCCISA KEV update
  50. 2026-07-01 18:33 UTCEG score recompute
  51. 2026-07-01 18:33 UTCGHSA enrichment
  52. 2026-07-01 15:02 UTCEPSS rescore
  53. 2026-07-01 15:02 UTCEPSS rescore
  54. 2026-07-01 14:33 UTCEG score recompute
  55. 2026-07-01 14:33 UTCGHSA enrichment
  56. 2026-07-01 10:33 UTCEG score recompute
  57. 2026-07-01 10:33 UTCGHSA enrichment
  58. 2026-07-01 06:33 UTCEG score recompute
  59. 2026-07-01 06:33 UTCGHSA enrichment
  60. 2026-07-01 02:33 UTCEG score recompute
  61. 2026-07-01 02:33 UTCGHSA enrichment
  62. 2026-06-30 22:33 UTCEG score recompute
  63. 2026-06-30 22:33 UTCGHSA enrichment
  64. 2026-06-30 18:32 UTCEG score recompute
  65. 2026-06-30 18:32 UTCGHSA enrichment
  66. 2026-06-30 14:32 UTCEG score recompute
  67. 2026-06-30 14:32 UTCGHSA enrichment
  68. 2026-06-30 10:31 UTCEG score recompute
  69. 2026-06-30 10:31 UTCGHSA enrichment
  70. 2026-06-30 06:31 UTCEG score recompute
  71. 2026-06-30 06:31 UTCGHSA enrichment
  72. 2026-06-30 02:32 UTCEG score recompute
  73. 2026-06-30 02:32 UTCGHSA enrichment
  74. 2026-06-29 22:33 UTCEG score recompute
  75. 2026-06-29 22:33 UTCGHSA enrichment

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Frequently asked(6)

What is CVE-2014-3931?
CVE-2014-3931 is a critical vulnerability published on March 31, 2017. 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.
When was CVE-2014-3931 disclosed?
CVE-2014-3931 was first published in the National Vulnerability Database on March 31, 2017, with the most recent update on April 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2014-3931 actively exploited?
Yes. CISA added CVE-2014-3931 to the Known Exploited Vulnerabilities catalog on July 7, 2025, affecting Looking Glass Multi-Router Looking Glass (MRLG). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2014-3931?
CVE-2014-3931 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2014-3931?
CVE-2014-3931 affects Looking Glass Multi-Router Looking Glass (MRLG). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2014-3931?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2014-3931, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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