CVE-2019-19196

Name: CVE-2019-19196
Creator: NVD / NIST
Published: 2020-02-12T15:15:12.147+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.36%

Last modified Jun 17, 2026

CVE-2019-19196 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. The Bluetooth Low Energy Secure Manager Protocol (SMP) implementation on Telink Semiconductor BLE SDK versions before November 2019 for TLSR8x5x through 3.4.0, TLSR823x through 1.3.0, and TLSR826x through 3.3 devices accepts a pairing request with a key size greater than 16 bytes, allowing an attacker in radio range to cause a buffer overflow and denial of service (crash) via crafted packets.. EPSS estimates a 1.36% chance of exploitation in the next 30 days.

Description

The Bluetooth Low Energy Secure Manager Protocol (SMP) implementation on Telink Semiconductor BLE SDK versions before November 2019 for TLSR8x5x through 3.4.0, TLSR823x through 1.3.0, and TLSR826x through 3.3 devices accepts a pairing request with a key size greater than 16 bytes, allowing an attacker in radio range to cause a buffer overflow and denial of service (crash) via crafted packets.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.36%

68.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Telink-Semi	Tlsr8258 Ble Sdk	<= 3.4.0
Telink-Semi	Tlsr8269 Ble Sdk	<= 3.3
Telink-Semi	Tlsr8253 Ble Sdk	<= 3.4.0
Telink-Semi	Tlsr8251 Ble Sdk	<= 3.4.0
Telink-Semi	Tlsr8232 Ble Sdk	<= 1.3.0

References

http://www.telink-semi.com/bleVendor Advisory
https://asset-group.github.io/disclosures/sweyntooth/Exploit, Third Party Advisory
http://www.telink-semi.com/bleVendor Advisory
https://asset-group.github.io/disclosures/sweyntooth/Exploit, Third Party Advisory

Timeline

Published: Feb 12, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19196?

How severe is CVE-2019-19196?

CVE-2019-19196 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.36% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19196?

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-2019-19196?

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

Scan your code now

Source: NVD / NIST