EUVD-2026-76768Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Adjacent attack vector (BLE range); no privileges or interaction needed; memory corruption yields high integrity and availability impact, no confidentiality loss.
Primary rating from Vendor (github).
CVSS VectorVendor: github
Lifecycle Timeline
7DescriptionCVE.org
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.
AnalysisAI
Memory corruption in ArduinoBLE's ATT layer write request handler allows an unauthenticated BLE client within Bluetooth range to overflow the ATTClass global object's write buffer by sending a crafted ATT Write Request. Versions prior to 2.0.2 are affected exclusively when at least one BLE characteristic is configured with the BLEEncryption property. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target device must be running ArduinoBLE prior to version 2.0.2 AND must have at least one BLE characteristic declared with the BLEEncryption property in the firmware sketch. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H rates this 7.2. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade ArduinoBLE to version 2.0.2 or later, available at https://github.com/arduino-libraries/ArduinoBLE/releases/tag/2.0.2 and through the Arduino Library Manager. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Arduino-based IoT devices and identify those using ArduinoBLE library prior to version 2.0.2, particularly those with BLE characteristics configured with the BLEEncryption property. …
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Same weakness CWE-131 – Incorrect Calculation of Buffer Size
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today