CVE-2026-51535

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

In OpENer 2.3.0 (commit 76b95cf), a resource exhaustion (Denial of Service) vulnerability exists in its network processing loop.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: 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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 9, 2026

Advisory Details (2)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

CVE-2026-51535 · GitHub

https://gist.github.com/MrAlaskan/bec306c51fec9f777b2599f5dea09dd1
generic

Denial of Service (DoS) via Single-Connection Slowloris Attack in TCP Network Handler · Issue #562 · EIPStackGroup/OpENer · GitHub

https://github.com/EIPStackGroup/OpENer/issues/562

Vendor Advisories for CVE-2026-51535(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 18× in last 7d / 106× 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 166 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51535?
CVE-2026-51535 is a high vulnerability published on July 8, 2026. In OpENer 2.3.0 (commit 76b95cf), a resource exhaustion (Denial of Service) vulnerability exists in its network processing loop.
When was CVE-2026-51535 disclosed?
CVE-2026-51535 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51535 actively exploited?
CVE-2026-51535 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 60.1% of all scored CVEs.
What is the CVSS score of CVE-2026-51535?
CVE-2026-51535 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51535?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51535, 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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