CVE-2020-16146: Espressif Esp-Idf

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Espressif ESP-IDF 2.x, 3.0.x through 3.0.9, 3.1.x through 3.1.7, 3.2.x through 3.2.3, 3.3.x through 3.3.2, and 4.0.x through 4.0.1 has a Buffer Overflow in BluFi provisioning in btc_blufi_recv_handler function in blufi_prf.c. An attacker can send a crafted BluFi protocol Write Attribute command to characteristic 0xFF01. With manipulated packet fields, there is a buffer overflow.

Affected products

• Espressif Esp-Idf: from 2.0.0, up to and including 2.1.1; from 3.0, up to and including 3.0.9; from 3.1, up to and including 3.1.7; from 3.2, up to and including 3.2.3; from 3.3, up to and including 3.3.2; from 4.0.0, up to and including 4.0.1

Published 2021-01-12. Last modified 2026-06-17.