CVE-2020-13593

Name: CVE-2020-13593
Creator: NVD / NIST
Published: 2020-08-31T15:15:10.493+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2020-13593 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The Bluetooth Low Energy Secure Manager Protocol (SMP) implementation in Texas Instruments SimpleLink SIMPLELINK-CC2640R2-SDK through 2.2.3 allows the Diffie-Hellman check during the Secure Connection pairing to be skipped if the Link Layer encryption setup is performed earlier. An attacker in radio range can achieve arbitrary read/write access to protected GATT service data, cause a denial of service, or possibly control a device's function by establishing an encrypted session with an unauthenticated Long Term Key (LTK).. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

The Bluetooth Low Energy Secure Manager Protocol (SMP) implementation in Texas Instruments SimpleLink SIMPLELINK-CC2640R2-SDK through 2.2.3 allows the Diffie-Hellman check during the Secure Connection pairing to be skipped if the Link Layer encryption setup is performed earlier. An attacker in radio range can achieve arbitrary read/write access to protected GATT service data, cause a denial of service, or possibly control a device's function by establishing an encrypted session with an unauthenticated Long Term Key (LTK).

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.26%

16.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Ti	Simplelink-Cc2640r2 Software Development Kit	<= 2.2.3

References

http://www.ti.com/tool/BLE-STACKVendor Advisory
https://asset-group.github.io/cves.htmlThird Party Advisory
https://asset-group.github.io/disclosures/sweyntooth/Third Party Advisory
http://www.ti.com/tool/BLE-STACKVendor Advisory
https://asset-group.github.io/cves.htmlThird Party Advisory
https://asset-group.github.io/disclosures/sweyntooth/Third Party Advisory

Timeline

Published: Aug 31, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13593?

How severe is CVE-2020-13593?

CVE-2020-13593 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13593?

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-2020-13593?

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

Scan your code now

Source: NVD / NIST