CVE-2026-54410

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-06-14. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.6Exploit: None knownExposed: 0

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

nanoMODBUS through v1.23.0 contains an off-by-one buffer overflow in the recv_msg_header function of the Modbus/TCP server that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of the 260-byte receive buffer by sending a crafted MBAP frame whose Length field is set to 255.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity86% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

June 14, 2026

Last Modified

August 10, 2026

Advisory Details (4)

Auto-updated Jun 15, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

CWE - CWE-787: Out-of-bounds Write (4.20)

https://cwe.mitre.org/data/definitions/787.html
generic

CWE - CWE-193: Off-by-one Error (4.20)

https://cwe.mitre.org/data/definitions/193.html
generic

nanoMODBUS/nanomodbus.c at v1.23.0 · debevv/nanoMODBUS · GitHub

https://github.com/debevv/nanoMODBUS/blob/v1.23.0/nanomodbus.c#L369
generic

GitHub - debevv/nanoMODBUS: A compact MODBUS RTU/TCP C library for embedded/microcontrollers · GitHub

https://github.com/debevv/nanoMODBUS

Vendor Advisories for CVE-2026-54410(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 98× 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 225 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54410?
CVE-2026-54410 is a high vulnerability published on June 14, 2026. nanoMODBUS through v1.23.0 contains an off-by-one buffer overflow in the recvmsgheader function of the Modbus/TCP server that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of the 260-byte receive buffer by sending a crafted MBAP frame whose Length field…
When was CVE-2026-54410 disclosed?
CVE-2026-54410 was first published in the National Vulnerability Database on June 14, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54410 actively exploited?
CVE-2026-54410 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 56.9% of all scored CVEs.
What is the CVSS score of CVE-2026-54410?
CVE-2026-54410 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-54410?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54410, 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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