Free and open · new CVEs checked every 20 minutesStatusRSSOpen dataContact

CVE-2019-19196: The Bluetooth Low Energy Secure Manager Protocol (SMP) implementation on Telink Semiconductor BLE SDK versions

46
This month
MEDIUM 6.5UPGRADEUPGRADEUPGRADE

CVE-2019-19196 is a medium-severity flaw (CVSS 6.5) affecting tlsr8258 ble sdk, tlsr8269 ble sdk, tlsr8253 ble sdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score6.5 (Medium)
Attack vectorAdjacent network
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance1.4% (top 28%)
CISA exploited listNo
WeaknessCWE-120
Published2020-02-12
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: telink-semi

Share: LinkedIn · X · Reddit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

telink-semi tlsr8258 ble sdk UPGRADE
Affected: <= 3.4.0
Fixed in: newer than 3.4.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy tlsr8258-ble-sdk || rpm -q tlsr8258-ble-sdk || tlsr8258-ble-sdk --version
2. UPGRADE to newer than 3.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade tlsr8258-ble-sdk
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade tlsr8258-ble-sdk
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
telink-semi tlsr8269 ble sdk UPGRADE
Affected: <= 3.3
Fixed in: newer than 3.3
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy tlsr8269-ble-sdk || rpm -q tlsr8269-ble-sdk || tlsr8269-ble-sdk --version
2. UPGRADE to newer than 3.3 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade tlsr8269-ble-sdk
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade tlsr8269-ble-sdk
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
telink-semi tlsr8253 ble sdk UPGRADE
Affected: <= 3.4.0
Fixed in: newer than 3.4.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy tlsr8253-ble-sdk || rpm -q tlsr8253-ble-sdk || tlsr8253-ble-sdk --version
2. UPGRADE to newer than 3.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade tlsr8253-ble-sdk
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade tlsr8253-ble-sdk
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
telink-semi tlsr8251 ble sdk UPGRADE
Affected: <= 3.4.0
Fixed in: newer than 3.4.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy tlsr8251-ble-sdk || rpm -q tlsr8251-ble-sdk || tlsr8251-ble-sdk --version
2. UPGRADE to newer than 3.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade tlsr8251-ble-sdk
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade tlsr8251-ble-sdk
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
telink-semi tlsr8232 ble sdk UPGRADE
Affected: <= 1.3.0
Fixed in: newer than 1.3.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy tlsr8232-ble-sdk || rpm -q tlsr8232-ble-sdk || tlsr8232-ble-sdk --version
2. UPGRADE to newer than 1.3.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade tlsr8232-ble-sdk
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade tlsr8232-ble-sdk
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-19196?

tlsr8258 ble sdk: upgrade to newer than 3.4.0; tlsr8269 ble sdk: upgrade to newer than 3.3; tlsr8253 ble sdk: upgrade to newer than 3.4.0. Exact commands for each OS are on this page.

Is CVE-2019-19196 being exploited?

CVE-2019-19196 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-19196 affect?

CVE-2019-19196 affects tlsr8258 ble sdk, tlsr8269 ble sdk, tlsr8253 ble sdk. Severity is medium (CVSS 6.5). 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 reque

How urgent is CVE-2019-19196?

Priority 46/100. Public exploit reference

Software pages

Bluetooth vulnerabilities

Related CVEs

References

← Back to latest CVEs

Get the weekly exploited-CVE digest by emailThe CVEs being attacked this week and how to fix them. No spam, unsubscribe any time.