CVE-2026-56766

Hydra before 9.7 contains a stack buffer overflow in the NTLM authentication handler used by SMTP, POP3, IMAP, NNTP, HTTP, HTTP-Proxy, and HTTP-Proxy-Urlenum modules when processing crafted NTLM Type-2 challenges. A malicious server can send a long domain in NTLM Type-2, overflowing a 500-byte st...