CVE-2020-13593

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-08-31 · updated 2026-06-17
Weakness: CWE-347

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).

Affected products

Ti Simplelink-Cc2640R2 Software Development Kit: through 2.2.3

References

http://www.ti.com/tool/BLE-STACK
https://asset-group.github.io/cves.html
https://asset-group.github.io/disclosures/sweyntooth/
http://www.ti.com/tool/BLE-STACK
https://asset-group.github.io/cves.html
https://asset-group.github.io/disclosures/sweyntooth/

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