---
id: CVE-2026-47773
title: ArduinoBLE enables Bluetooth Low Energy connectivity on certain Arduino models
summary: >-
  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 mem…
severity: high
cvss: 7.2
cvssVector: 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-131
  - CWE-787
vendor: arduino-libraries
product: ArduinoBLE
affected:
  - ArduinoBLE < 2.0.2
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T17:17:15.570'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-47773'
references:
  - url: >-
      https://github.com/arduino-libraries/ArduinoBLE/pull/431/changes/1460e1a68221fca854b7b1e278cab76e763c00e6
    label: security-advisories@github.com
  - url: 'https://github.com/arduino-libraries/ArduinoBLE/releases/tag/2.0.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/arduino-libraries/ArduinoBLE/security/advisories/GHSA-77v6-cw9f-9whg
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T16:41:13.362567Z'
cvssSource: cna
epss: 0.001
epssPercentile: 0.00963
ingestedAt: '2026-09-14T11:11:19.878Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.