CVE-2021-28139

8.8 highEPSS 1.4%

High (8.8) in espressif esp-idf. EPSS 1.4% chance of exploitation in the next 30 days.

The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.

Severity

CVSS 3.1

8.8 high

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

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
Published: 2021-09-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

espressif:esp-idf

References

https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
https://github.com/espressif/esp-idf
https://github.com/espressif/esp32-bt-lib
https://www.espressif.com/en/products/socs/esp32
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf

Check your stack JSON