CVE-2026-45811

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-24. 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 week
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: None knownExposed: 0

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

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Apache NimBLE. The HCI socket transport did not check whether a received HCI event would fit the configured event pool before copying it, allowing a buffer overflow. Severity is low: exploitation requires either a misconfigured pool size or a malicious/compromised controller on the other end of the HCI socket link, not over-the-air Bluetooth access.

This issue affects Apache NimBLE: through 1.9.0.

Users are recommended to upgrade to version 1.10.0, which fixes the issue.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

July 24, 2026

Last Modified

July 27, 2026

Advisory Details (2)

Auto-updated Jul 24, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic
https://lists.apache.org/thread/5mkz68y1py0o6zmxtc3l1o8grtrb78m0
github_commit

commit dcc4e4f02610 (apache/mynewt-nimble)

Fix landed in apache/mynewt-nimble commit dcc4e4f02610 — awaiting tagged release

https://github.com/apache/mynewt-nimble/commit/dcc4e4f026109eecd507de9479bb5019306a4a41

Vendor Advisories for CVE-2026-45811(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 22× in last 7d / 94× 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 197 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-45811?
CVE-2026-45811 is a high vulnerability published on July 24, 2026. Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Apache NimBLE. The HCI socket transport did not check whether a received HCI event would fit the configured event pool before copying it, allowing a buffer overflow. Severity is low: exploitation requires either…
When was CVE-2026-45811 disclosed?
CVE-2026-45811 was first published in the National Vulnerability Database on July 24, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45811 actively exploited?
CVE-2026-45811 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 72.6% of all scored CVEs.
What is the CVSS score of CVE-2026-45811?
CVE-2026-45811 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-45811?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45811, 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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