CVE-2026-45811

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH 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 — 5 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(high)
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 24× in last 7d / 24× 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.

  1. 2026-07-28 15:36 UTCEPSS rescore
  2. 2026-07-28 13:05 UTCGHSA enrichment
  3. 2026-07-28 02:01 UTCGHSA enrichment
  4. 2026-07-27 15:01 UTCEG score recompute
  5. 2026-07-27 15:00 UTCGHSA enrichment
  6. 2026-07-27 14:13 UTCEPSS rescore
  7. 2026-07-27 12:09 UTCGHSA enrichment
  8. 2026-07-27 01:07 UTCEG score recompute
  9. 2026-07-27 01:07 UTCGHSA enrichment
  10. 2026-07-26 14:54 UTCEPSS rescore
  11. 2026-07-26 14:54 UTCEPSS rescore
  12. 2026-07-26 14:05 UTCEG score recompute
  13. 2026-07-26 14:05 UTCGHSA enrichment
  14. 2026-07-26 03:03 UTCEG score recompute
  15. 2026-07-26 03:02 UTCGHSA enrichment
  16. 2026-07-25 14:18 UTCEPSS rescore
  17. 2026-07-24 18:33 UTCEG score recompute▲ 7.50
  18. 2026-07-24 18:32 UTCGHSA enrichment
  19. 2026-07-24 18:31 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  20. 2026-07-24 16:11 UTCNVD update
  21. 2026-07-24 15:13 UTCMITRE cvelistV5
  22. 2026-07-24 14:12 UTCNVD update
  23. 2026-07-24 12:42 UTCEG score recompute
  24. 2026-07-24 12:41 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 73.2% 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.

Dependency Blast Radius

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