CVE-2026-47773

HIGHPre-NVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 99% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.2Exploit: None knownExposed: 0

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

ArduinoBLE enables Bluetooth Low Energy connectivity on certain Arduino models. Versions prior to 2.0.2 contain a missing bounds check in the ATT layer write request handler that allows a remote, unauthenticated BLE client to corrupt memory in the ATTClass global object. Devices running ArduinoBLE with one or more characteristics configured with the BLEEncryption property are affected. The fix is included starting from the 2.0.2 release.

CVSS v3
7.2
EG Score
7.2(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity72% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 11, 2026
Patch available. Sources: github, github_pr, github_release.
github_release Patch Available

2.0.2

Patch available: arduino-libraries/ArduinoBLE 2.0.2

https://github.com/arduino-libraries/ArduinoBLE/releases/tag/2.0.2
github_pr Patch Available

check if data fits writeBuffer before copy

Patch available: arduino-libraries/ArduinoBLE 2.0.2 (PR #431 merged 2026-05-05)

https://github.com/arduino-libraries/ArduinoBLE/pull/431/changes/1460e1a68221fca854b7b1e278cab76e763c00e6
github Patch Available

ArduinoBLE: Memory corruption via malformed ATT write request · Advisory · arduino-libraries/ArduinoBLE · GitHub

https://github.com/arduino-libraries/ArduinoBLE/security/advisories/GHSA-77v6-cw9f-9whg

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 16× 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. 2026-09-18 23:25 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 21:28 UTCEG score recompute
  4. 2026-09-16 19:30 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 06:31 UTCEG score recompute
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 17:33 UTCEG score recompute
  9. 2026-09-15 16:43 UTCEG score recompute
  10. 2026-09-15 16:09 UTCEG score recompute
  11. 2026-09-14 01:14 UTCEG score recompute
  12. 2026-09-13 16:47 UTCEPSS rescore
  13. 2026-09-12 23:18 UTCEG score recompute
  14. 2026-09-11 21:21 UTCEG score recompute
  15. 2026-09-11 21:14 UTCEG score recompute
  16. 2026-09-11 21:13 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-47773?
CVE-2026-47773 is a high vulnerability published on September 11, 2026. ArduinoBLE enables Bluetooth Low Energy connectivity on certain Arduino models. Versions prior to 2.0.2 contain a missing bounds check in the ATT layer write request handler that allows a remote, unauthenticated BLE client to corrupt memory in the ATTClass global object. Devices running ArduinoBLE…
When was CVE-2026-47773 disclosed?
CVE-2026-47773 was first published in the National Vulnerability Database on September 11, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47773 actively exploited?
CVE-2026-47773 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 99.0% of all scored CVEs.
What is the CVSS score of CVE-2026-47773?
CVE-2026-47773 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-47773?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47773, 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

Explore the affected products and dependency analysis for CVE-2026-47773

Explore →

Is Your Infrastructure Affected by CVE-2026-47773?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs