CVE-2022-25640: wolfSSL

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

In wolfSSL before 5.2.0, a TLS 1.3 server cannot properly enforce a requirement for mutual authentication. A client can simply omit the certificate_verify message from the handshake, and never present a certificate.

Affected products

• wolfSSL wolfSSL: before 5.2.0 (fixed in 5.2.0)

Published 2022-02-24. Last modified 2026-06-17.