What’s Vulnerable › Vulnerabilities

CVE-2020-15531

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-08-20 · updated 2026-06-17
• Weakness: CWE-120

Description

Silicon Labs Bluetooth Low Energy SDK before 2.13.3 has a buffer overflow via packet data. This is an over-the-air remote code execution vulnerability in Bluetooth LE in EFR32 SoCs and associated modules running Bluetooth SDK, supporting Central or Observer roles.

Affected products

• silabs.com Bluetooth SDK: before 2.13.3.0 — fixed in 2.13.3.0

How to fix

Upgrade to a fixed version: silabs.com Bluetooth SDK 2.13.3.0. Check the vendor advisory for mitigations.

References

• https://github.com/darkmentorllc/jackbnimble/blob/master/host/pocs/silabs_efr32_extadv_rce.py
• https://github.com/darkmentorllc/publications/tree/master/2020/TI_SILABS_BLE_RCEs
• https://www.blackhat.com/us-20/briefings/schedule/#finding-new-bluetooth-low-energy-exploits-via-reverse-engineering-multiple-vendors-firmwares-19655
• https://www.youtube.com/watch?v=saoTr1NwdzM
• https://github.com/darkmentorllc/jackbnimble/blob/master/host/pocs/silabs_efr32_extadv_rce.py
• https://github.com/darkmentorllc/publications/tree/master/2020/TI_SILABS_BLE_RCEs
• https://www.blackhat.com/us-20/briefings/schedule/#finding-new-bluetooth-low-energy-exploits-via-reverse-engineering-multiple-vendors-firmwares-19655
• https://www.youtube.com/watch?v=saoTr1NwdzM

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