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
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 29%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 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)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
29%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

March 31, 2017

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 19, 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 59× in last 7d / 221× 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 665 total refreshes for this CVE.

  1. 2026-08-21 22:10 UTCGHSA enrichment
  2. 2026-08-21 18:08 UTCGHSA enrichment
  3. 2026-08-21 16:49 UTCCISA KEV update
  4. 2026-08-21 14:09 UTCGHSA enrichment
  5. 2026-08-21 10:10 UTCGHSA enrichment
  6. 2026-08-21 06:11 UTCGHSA enrichment
  7. 2026-08-21 02:12 UTCEG score recompute
  8. 2026-08-21 02:11 UTCGHSA enrichment
  9. 2026-08-20 22:50 UTCEPSS rescore
  10. 2026-08-20 22:13 UTCGHSA enrichment
  11. 2026-08-20 18:14 UTCGHSA enrichment
  12. 2026-08-20 17:06 UTCCISA KEV update
  13. 2026-08-20 14:15 UTCGHSA enrichment
  14. 2026-08-20 10:16 UTCGHSA enrichment
  15. 2026-08-20 06:16 UTCGHSA enrichment
  16. 2026-08-20 02:17 UTCGHSA enrichment
  17. 2026-08-19 22:18 UTCGHSA enrichment
  18. 2026-08-19 18:18 UTCEG score recompute
  19. 2026-08-19 18:18 UTCGHSA enrichment
  20. 2026-08-19 17:33 UTCCISA KEV update
  21. 2026-08-19 16:59 UTCEPSS rescore
  22. 2026-08-19 14:18 UTCGHSA enrichment
  23. 2026-08-19 10:19 UTCGHSA enrichment
  24. 2026-08-19 06:20 UTCGHSA enrichment
  25. 2026-08-19 02:20 UTCGHSA enrichment
Show 75 more
  1. 2026-08-18 22:20 UTCGHSA enrichment
  2. 2026-08-18 18:21 UTCGHSA enrichment
  3. 2026-08-18 16:58 UTCCISA KEV update
  4. 2026-08-18 14:21 UTCEG score recompute
  5. 2026-08-18 14:21 UTCGHSA enrichment
  6. 2026-08-18 13:43 UTCEPSS rescore
  7. 2026-08-18 10:18 UTCGHSA enrichment
  8. 2026-08-18 06:19 UTCGHSA enrichment
  9. 2026-08-18 02:20 UTCGHSA enrichment
  10. 2026-08-17 22:18 UTCGHSA enrichment
  11. 2026-08-17 18:19 UTCGHSA enrichment
  12. 2026-08-17 14:17 UTCGHSA enrichment
  13. 2026-08-17 13:56 UTCCISA KEV update
  14. 2026-08-17 10:18 UTCGHSA enrichment
  15. 2026-08-17 06:19 UTCGHSA enrichment
  16. 2026-08-17 02:20 UTCGHSA enrichment
  17. 2026-08-16 22:21 UTCGHSA enrichment
  18. 2026-08-16 18:22 UTCEG score recompute
  19. 2026-08-16 18:22 UTCGHSA enrichment
  20. 2026-08-16 14:51 UTCEPSS rescore
  21. 2026-08-16 14:23 UTCGHSA enrichment
  22. 2026-08-16 10:23 UTCGHSA enrichment
  23. 2026-08-16 06:24 UTCGHSA enrichment
  24. 2026-08-16 02:25 UTCEG score recompute
  25. 2026-08-16 02:25 UTCGHSA enrichment
  26. 2026-08-16 02:09 UTCEPSS rescore
  27. 2026-08-15 22:26 UTCGHSA enrichment
  28. 2026-08-15 18:27 UTCGHSA enrichment
  29. 2026-08-15 14:28 UTCGHSA enrichment
  30. 2026-08-15 10:29 UTCGHSA enrichment
  31. 2026-08-15 06:30 UTCGHSA enrichment
  32. 2026-08-15 02:30 UTCEG score recompute
  33. 2026-08-15 02:30 UTCGHSA enrichment
  34. 2026-08-15 01:25 UTCEPSS rescore
  35. 2026-08-14 22:31 UTCGHSA enrichment
  36. 2026-08-14 18:32 UTCGHSA enrichment
  37. 2026-08-14 14:33 UTCGHSA enrichment
  38. 2026-08-14 10:34 UTCGHSA enrichment
  39. 2026-08-14 06:35 UTCGHSA enrichment
  40. 2026-08-14 02:35 UTCGHSA enrichment
  41. 2026-08-13 22:36 UTCEG score recompute
  42. 2026-08-13 22:36 UTCGHSA enrichment
  43. 2026-08-13 18:37 UTCGHSA enrichment
  44. 2026-08-13 14:38 UTCGHSA enrichment
  45. 2026-08-13 10:39 UTCGHSA enrichment
  46. 2026-08-13 06:40 UTCGHSA enrichment
  47. 2026-08-13 02:41 UTCGHSA enrichment
  48. 2026-08-12 22:42 UTCGHSA enrichment
  49. 2026-08-12 18:43 UTCGHSA enrichment
  50. 2026-08-12 14:44 UTCEG score recompute
  51. 2026-08-12 14:44 UTCGHSA enrichment
  52. 2026-08-12 13:46 UTCEPSS rescore
  53. 2026-08-12 10:45 UTCGHSA enrichment
  54. 2026-08-12 06:45 UTCGHSA enrichment
  55. 2026-08-12 02:46 UTCGHSA enrichment
  56. 2026-08-11 22:46 UTCGHSA enrichment
  57. 2026-08-11 19:32 UTCCISA KEV update
  58. 2026-08-11 18:47 UTCGHSA enrichment
  59. 2026-08-11 14:48 UTCEG score recompute
  60. 2026-08-11 14:48 UTCGHSA enrichment
  61. 2026-08-11 10:49 UTCGHSA enrichment
  62. 2026-08-11 06:50 UTCGHSA enrichment
  63. 2026-08-11 02:51 UTCGHSA enrichment
  64. 2026-08-10 22:52 UTCGHSA enrichment
  65. 2026-08-10 18:53 UTCGHSA enrichment
  66. 2026-08-10 14:54 UTCGHSA enrichment
  67. 2026-08-10 10:54 UTCGHSA enrichment
  68. 2026-08-10 06:55 UTCGHSA enrichment
  69. 2026-08-10 02:56 UTCGHSA enrichment
  70. 2026-08-09 22:57 UTCGHSA enrichment
  71. 2026-08-09 18:58 UTCGHSA enrichment
  72. 2026-08-09 14:59 UTCGHSA enrichment
  73. 2026-08-09 11:00 UTCGHSA enrichment
  74. 2026-08-09 07:01 UTCGHSA enrichment
  75. 2026-08-09 03:02 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 June 17, 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.

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