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CVE-2026-47773— ArduinoBLE: Memory corruption via malformed ATT write request

Quick assessment

Affected
arduino-libraries ArduinoBLE
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ArduinoBLE 为某些 Arduino 型号提供蓝牙低功耗（BLE）连接功能。2.0.2 之前的版本中，ATT 层的写请求处理器缺少边界检查，使得远程、未认证的 BLE 客户端能够破坏 ATTClass 全局对象的内存。运行 ArduinoBLE 且配置了一个或多个具有 BLEEncryption 特性的设备均受影响。该修复已包含在 2.0.2 版本起。

CVSS 7.2 · High EPSS 0.10% · P1

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
arduino-libraries ArduinoBLE < 2.0.2 affected
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I. Basic Information for CVE-2026-47773

Vulnerability Information
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Vulnerability Title
ArduinoBLE: Memory corruption via malformed ATT write request
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区大小计算不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
arduino-libraries ArduinoBLE < 2.0.2 -

II. Public POCs for CVE-2026-47773

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-47773

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Patches & Fixes for CVE-2026-47773 (1)

Vendor Advisories for CVE-2026-47773 (1)

Vendor Pages for CVE-2026-47773 (1)

IV. Related Vulnerabilities

Same weakness: CWE-131

V. Comments for CVE-2026-47773

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