VULNERABILITY INTELLIGENCE

CVE-2021-33360

CVSS score9.8 CRITICAL

EPSS probability0.80%

CISA KEVNot currently listed

Published2023-03-10

Last modified2026-06-17

Description

DoTls13CertificateVerify in tls13.c in wolfSSL before 4.7.0 does not cease processing for certain anomalous peer behavior (sending an ED22519, ED448, ECC, or RSA signature without the corresponding certificate). The client side is affected because man-in-the-middle attackers can impersonate TLS 1.3 servers.