CVE-2019-9689: Axtls Project Axtls

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

process_certificate in tls1.c in Cameron Hamilton-Rich axTLS through 2.1.5 has a Buffer Overflow via a crafted TLS certificate handshake message with zero certificates.

Affected products

• Axtls Project Axtls: up to and including 2.1.5

Published 2019-12-03. Last modified 2026-06-17.