CVE-2021-43666: Arm Mbed TLS

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

A Denial of Service vulnerability exists in mbed TLS 3.0.0 and earlier in the mbedtls_pkcs12_derivation function when an input password's length is 0.

Affected products

• Arm Mbed TLS: up to and including 3.0.0
• Debian Debian Linux: version 10.0 only

Published 2022-03-24. Last modified 2026-06-17.