CVE-2026-35227

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 73% 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, nvd
8.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.2Exploit: NoneExposed: 0

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

An unauthenticated remote attacker may exhaust all available TCP connections in the CODESYS Modbus TCP Server stack if a race condition in connection handling is successfully exploited, preventing legitimate clients from establishing new connections.

CVSS v3
8.2
EG Score
8.2(medium)
EPSS
27.3%
KEV
Not listed

Published

May 12, 2026

Last Modified

May 12, 2026

Advisory Details (1)

Auto-updated May 12, 2026
No patch confirmed yet.
generic

CODESYS Modbus TCP Server - Improper resource management

https://certvde.com/de/advisories/VDE-2026-042

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 54× 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 160 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-35227?
CVE-2026-35227 is a high vulnerability published on May 12, 2026. An unauthenticated remote attacker may exhaust all available TCP connections in the CODESYS Modbus TCP Server stack if a race condition in connection handling is successfully exploited, preventing legitimate clients from establishing new connections.
When was CVE-2026-35227 disclosed?
CVE-2026-35227 was first published in the National Vulnerability Database on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-35227 actively exploited?
CVE-2026-35227 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-35227?
CVE-2026-35227 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-35227?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-35227, 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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