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 — 3 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low mission impact
CISA-KEV: ExploitedEPSS PROB: 29%CVSS: 9.8Exploit: No code on recordExposed services: Not assessed

No fix has been recorded since the CVE record was published in 2017 — use a compensating control (WAF / firewall / segmentation) and check the vendor's advisory.

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
9.8CRITICALhigh confidence
EG Risk
99
EG Risk 99/100

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 (value × EchelonGraph’s weight)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation100% × 40%
Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Attend at low mission impact; Act at medium or high.
Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix has been recorded since the CVE record was published in 2017. Restrict network exposure of the affected system or apply the vendor's mitigation sooner than your standard update timelines at low mission impact and as soon as possible at medium or high, and check the vendor's advisory for a fix.
EPSS PROB
29%
EPSS %ILE
98th
KEV
⚠ Exploited

SSVC (CISA's decision table, applied by EchelonGraph)Attend at low mission impact; Act at medium or high.

No fix has been recorded since the CVE record was published in 2017. Restrict network exposure of the affected system or apply the vendor's mitigation sooner than your standard update timelines at low mission impact and as soon as possible at medium or high, and check the vendor's advisory for a fix.

Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days & forensic triage if the affected system is publicly exposed; 3 days & forensic triage if it is not.

In CISA KEV yes (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

March 31, 2017

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Oct 7, 2026
⚠️ Actively exploited (CISA KEV). No fix on record since 2017. Sources: cisa.
cisa🔴 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 54× in last 7d / 239× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 1,064 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 965 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 14:18 UTCEG score recompute
  2. 2026-10-11 14:18 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-11 13:40 UTCEPSS rescoreEPSS 29% · 98th percentile
  4. 2026-10-11 10:19 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-10-11 06:19 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-11 02:18 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-10 22:16 UTCEG score recompute
  8. 2026-10-10 22:16 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-10 19:54 UTCEPSS rescoreEPSS 29% · 98th percentile
  10. 2026-10-10 18:16 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-10-10 14:16 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-10 10:14 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-10-10 06:15 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-10 02:16 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-09 22:16 UTCEG score recompute
  16. 2026-10-09 22:16 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-09 20:01 UTCEPSS rescoreEPSS 29% · 98th percentile
  18. 2026-10-09 18:16 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-10-09 14:16 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-09 10:15 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-09 06:09 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-09 02:10 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-10-08 22:11 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-08 18:12 UTCEG score recompute
  25. 2026-10-08 18:11 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
Show 74 more
  1. 2026-10-08 16:34 UTCEPSS rescoreEPSS 29% · 98th percentile
  2. 2026-10-08 14:11 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-08 10:10 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-08 06:11 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-10-08 02:11 UTCEG score recompute
  6. 2026-10-08 02:11 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-07 23:39 UTCEPSS rescoreEPSS 29% · 98th percentile
  8. 2026-10-07 22:11 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-07 18:12 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-10-07 14:13 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-10-07 10:13 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-07 06:13 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-10-07 02:14 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-06 22:15 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-06 18:16 UTCEG score recompute
  16. 2026-10-06 18:16 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-06 15:11 UTCEPSS rescoreEPSS 29% · 98th percentile
  18. 2026-10-06 14:17 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-10-06 10:17 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-06 06:18 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-06 02:19 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-05 22:19 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-10-05 18:18 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-05 14:19 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-05 10:20 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  26. 2026-10-05 06:20 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-05 02:21 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  28. 2026-10-04 22:22 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  29. 2026-10-04 18:22 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  30. 2026-10-04 14:20 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-10-04 10:20 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  32. 2026-10-04 06:20 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  33. 2026-10-04 02:21 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  34. 2026-10-03 22:22 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  35. 2026-10-03 18:22 UTCEG score recompute
  36. 2026-10-03 18:22 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  37. 2026-10-03 14:21 UTCEPSS rescoreEPSS 29% · 98th percentile
  38. 2026-10-03 14:19 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-10-03 10:20 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  40. 2026-10-03 06:21 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  41. 2026-10-03 02:21 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  42. 2026-10-02 22:20 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  43. 2026-10-02 18:21 UTCEG score recompute
  44. 2026-10-02 18:21 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  45. 2026-10-02 14:21 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  46. 2026-10-02 10:21 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  47. 2026-10-02 06:22 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-10-02 02:23 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  49. 2026-10-01 22:23 UTCEG score recompute
  50. 2026-10-01 22:22 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-10-01 19:43 UTCEPSS rescoreEPSS 29% · 98th percentile
  52. 2026-10-01 18:22 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  53. 2026-10-01 14:21 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-10-01 10:22 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  55. 2026-10-01 06:23 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  56. 2026-10-01 02:24 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  57. 2026-09-30 22:25 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  58. 2026-09-30 18:26 UTCEG score recompute
  59. 2026-09-30 18:26 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-09-30 14:58 UTCEPSS rescoreEPSS 29% · 98th percentile
  61. 2026-09-30 14:27 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  62. 2026-09-30 10:27 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  63. 2026-09-30 06:24 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  64. 2026-09-30 02:24 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-09-29 22:25 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  66. 2026-09-29 18:25 UTCEG score recompute
  67. 2026-09-29 18:25 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  68. 2026-09-29 14:26 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  69. 2026-09-29 10:24 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  70. 2026-09-29 06:21 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  71. 2026-09-29 02:23 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-09-28 22:23 UTCEG score recompute
  73. 2026-09-28 22:23 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8
  74. 2026-09-28 18:24 UTCGHSA enrichmentGHSA-vwmm-77c8-pxrj · GitHub severity CRITICAL · GitHub CVSS 9.8

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2014-3931?
CVE-2014-3931 is a critical-severity vulnerability; its CVE record was 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 the CVE record for CVE-2014-3931 published?
The CVE record for CVE-2014-3931 was published on March 31, 2017. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
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 attention. No fix has been recorded since the CVE record was published in 2017. Restrict network exposure of the affected system or apply the vendor's mitigation, and check the vendor's advisory for a fix.
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).
How do I remediate CVE-2014-3931?
No fix for CVE-2014-3931 has been recorded since its CVE record was published in 2017. Restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and check the vendor's advisory for a fix.

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