CVE-2026-8805

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 52% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.7Exploit: None knownExposed: 0

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

Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

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
Severity87% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

June 19, 2026

Last Modified

June 22, 2026

Advisory Details (1)

Auto-updated Jun 19, 2026
Patch available. Sources: cisa.
cisa Patch Available

Mitsubishi Electric MELSEC iQ-F Series | CISA

https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-05

Vendor Advisories for CVE-2026-8805(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 59× 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 230 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 09:38 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-06 13:48 UTCEPSS rescore
  5. 2026-09-05 15:31 UTCEPSS rescore
  6. 2026-09-04 05:07 UTCEPSS rescore
  7. 2026-09-02 14:12 UTCEPSS rescore
  8. 2026-09-01 13:54 UTCEPSS rescore
  9. 2026-09-01 04:40 UTCEPSS rescore
  10. 2026-08-30 20:53 UTCEG score recompute
  11. 2026-08-30 20:53 UTCGHSA enrichment
  12. 2026-08-30 19:18 UTCEPSS rescore
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-28 21:42 UTCEPSS rescore
  15. 2026-08-27 14:25 UTCEPSS rescore
  16. 2026-08-26 14:47 UTCEPSS rescore
  17. 2026-08-25 13:49 UTCEPSS rescore
  18. 2026-08-25 01:32 UTCGHSA enrichment
  19. 2026-08-24 14:36 UTCEG score recompute
  20. 2026-08-24 14:36 UTCGHSA enrichment
  21. 2026-08-24 14:18 UTCEPSS rescore
  22. 2026-08-23 23:17 UTCGHSA enrichment
  23. 2026-08-23 11:58 UTCGHSA enrichment
  24. 2026-08-23 01:02 UTCEG score recompute
  25. 2026-08-23 01:02 UTCGHSA enrichment
Show 75 more
  1. 2026-08-23 00:19 UTCEPSS rescore
  2. 2026-08-21 23:49 UTCEPSS rescore
  3. 2026-08-21 17:35 UTCGHSA enrichment
  4. 2026-08-21 06:21 UTCEG score recompute
  5. 2026-08-21 06:21 UTCGHSA enrichment
  6. 2026-08-20 22:56 UTCEPSS rescore
  7. 2026-08-20 19:03 UTCGHSA enrichment
  8. 2026-08-20 08:07 UTCEG score recompute
  9. 2026-08-20 08:07 UTCGHSA enrichment
  10. 2026-08-19 17:04 UTCEPSS rescore
  11. 2026-08-19 07:25 UTCEG score recompute
  12. 2026-08-19 07:25 UTCGHSA enrichment
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 13:49 UTCEPSS rescore
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 07:33 UTCGHSA enrichment
  17. 2026-08-16 20:38 UTCEG score recompute
  18. 2026-08-16 20:38 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 08:01 UTCEG score recompute
  22. 2026-08-16 08:01 UTCGHSA enrichment
  23. 2026-08-16 02:15 UTCEPSS rescore
  24. 2026-08-15 21:06 UTCGHSA enrichment
  25. 2026-08-15 09:01 UTCEG score recompute
  26. 2026-08-15 09:01 UTCGHSA enrichment
  27. 2026-08-15 01:31 UTCEPSS rescore
  28. 2026-08-14 21:13 UTCGHSA enrichment
  29. 2026-08-14 10:17 UTCGHSA enrichment
  30. 2026-08-13 23:22 UTCEG score recompute
  31. 2026-08-13 23:22 UTCGHSA enrichment
  32. 2026-08-13 22:00 UTCEPSS rescore
  33. 2026-08-13 12:26 UTCGHSA enrichment
  34. 2026-08-13 01:31 UTCGHSA enrichment
  35. 2026-08-12 14:35 UTCEG score recompute
  36. 2026-08-12 14:35 UTCGHSA enrichment
  37. 2026-08-12 13:51 UTCEPSS rescore
  38. 2026-08-12 03:33 UTCGHSA enrichment
  39. 2026-08-11 16:38 UTCEG score recompute
  40. 2026-08-11 16:37 UTCGHSA enrichment
  41. 2026-08-11 13:43 UTCEPSS rescore
  42. 2026-08-11 05:40 UTCEG score recompute
  43. 2026-08-11 05:40 UTCGHSA enrichment
  44. 2026-08-11 00:00 UTCEPSS rescore
  45. 2026-08-10 18:45 UTCGHSA enrichment
  46. 2026-08-10 07:29 UTCGHSA enrichment
  47. 2026-08-09 20:34 UTCEG score recompute
  48. 2026-08-09 20:34 UTCGHSA enrichment
  49. 2026-08-09 13:47 UTCEPSS rescore
  50. 2026-08-09 09:38 UTCGHSA enrichment
  51. 2026-08-08 22:43 UTCEG score recompute
  52. 2026-08-08 22:43 UTCGHSA enrichment
  53. 2026-08-08 16:37 UTCEPSS rescore
  54. 2026-08-08 11:47 UTCGHSA enrichment
  55. 2026-08-08 00:52 UTCEG score recompute
  56. 2026-08-08 00:52 UTCGHSA enrichment
  57. 2026-08-07 16:30 UTCEPSS rescore
  58. 2026-08-07 13:56 UTCGHSA enrichment
  59. 2026-08-07 03:00 UTCGHSA enrichment
  60. 2026-08-06 16:00 UTCEG score recompute
  61. 2026-08-06 16:00 UTCGHSA enrichment
  62. 2026-08-06 13:47 UTCEPSS rescore
  63. 2026-08-06 04:55 UTCEG score recompute
  64. 2026-08-06 04:55 UTCGHSA enrichment
  65. 2026-08-05 19:17 UTCEPSS rescore
  66. 2026-08-05 19:17 UTCEPSS rescore
  67. 2026-08-05 17:59 UTCGHSA enrichment
  68. 2026-08-05 02:52 UTCGHSA enrichment
  69. 2026-08-04 15:22 UTCEG score recompute
  70. 2026-08-04 15:22 UTCGHSA enrichment
  71. 2026-08-04 15:10 UTCEPSS rescore
  72. 2026-08-04 10:39 UTCEPSS rescore
  73. 2026-08-04 01:32 UTCGHSA enrichment
  74. 2026-08-03 14:36 UTCEG score recompute
  75. 2026-08-03 14:36 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8805?
CVE-2026-8805 is a high vulnerability published on June 19, 2026. Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a…
When was CVE-2026-8805 disclosed?
CVE-2026-8805 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8805 actively exploited?
CVE-2026-8805 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 51.5% of all scored CVEs.
What is the CVSS score of CVE-2026-8805?
CVE-2026-8805 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-8805?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8805, 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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