CVE-2020-16630: Ti 15.4-Stack

Medium severity, CVSS 6.8. EPSS: 0.7% chance of exploitation in the next 30 days.

TI’s BLE stack caches and reuses the LTK’s property for a bonded mobile. A LTK can be an unauthenticated-and-no-MITM-protection key created by Just Works or an authenticated-and-MITM-protection key created by Passkey Entry, Numeric Comparison or OOB. Assume that a victim mobile uses secure pairing to pair with a victim BLE device based on TI chips and generate an authenticated-and-MITM-protection LTK. If a fake mobile with the victim mobile’s MAC address uses Just Works and pairs with the victim device, the generated LTK still has the property of authenticated-and-MITM-protection. Therefore, the fake mobile can access attributes with the authenticated read/write permission.

Affected products

• Ti 15.4-Stack: affected versions not specified
• Ti BLE5-Stack: affected versions not specified
• Ti Dynamic Multi-Protocal Manager: affected versions not specified
• Ti Easylink: affected versions not specified
• Ti Openthread: affected versions not specified
• Ti Real-Time Operating System: affected versions not specified
• Ti Z-Stack: affected versions not specified

Published 2021-09-20. Last modified 2026-06-17.