CVE-2020-16630

Name: CVE-2020-16630
Creator: NVD / NIST
Published: 2021-09-20T20:15:11.337+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2020-16630 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.8/10

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

0.67%

47.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Ti	15.4-Stack	All versions
Ti	Ble5-Stack	All versions
Ti	Dynamic Multi-Protocal Manager	All versions
Ti	Easylink	All versions
Ti	Openthread	All versions
Ti	Z-Stack	All versions
Ti	Real-Time Operating System	All versions

References

http://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/exports/changelog.htmlVendor Advisory
https://www.usenix.org/system/files/sec20-zhang-yue.pdfExploit, Third Party Advisory
http://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/exports/changelog.htmlVendor Advisory
https://www.usenix.org/system/files/sec20-zhang-yue.pdfExploit, Third Party Advisory

Timeline

Published: Sep 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-16630?

How severe is CVE-2020-16630?

CVE-2020-16630 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2020-16630?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-16630?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST