CVE-2026-51541

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: Elevated riskExposed: 0

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

OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed explicit requests with a forged EPath size. An attacker can send a valid ENIP SendRRData frame carrying a very short CIP payload whose path_size field claims that many more path words are present than are actually available. Because the parser trusts the attacker-controlled path_size and continues decoding path segments without a remaining-length boundary, it reads beyond the end of the stack receive buffer.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
72(Attend)
EG Risk 72/100SSVC: Attend

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
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

July 13, 2026

Last Modified

August 11, 2026

Advisory Details (2)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

Stack Out-of-Bounds Read in Blind EPath Decoding · Issue #582 · EIPStackGroup/OpENer · GitHub

https://github.com/EIPStackGroup/OpENer/issues/582
generic

CVE-2026-51541 · GitHub

https://gist.github.com/MrAlaskan/705c680856e48c535148265c0899ad4b

Vendor Advisories for CVE-2026-51541(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 32× in last 7d / 203× 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 264 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51541?
CVE-2026-51541 is a critical vulnerability published on July 13, 2026. OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed explicit requests with a forged EPath size. An attacker can send a valid ENIP SendRRData frame carrying a very short CIP payload whose pathsize field claims that many more path words are…
When was CVE-2026-51541 disclosed?
CVE-2026-51541 was first published in the National Vulnerability Database on July 13, 2026, with the most recent update on August 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51541 actively exploited?
CVE-2026-51541 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.0% of all scored CVEs.
What is the CVSS score of CVE-2026-51541?
CVE-2026-51541 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51541?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51541, 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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