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CVE-2026-56766: Stack-based Buffer Overflow in vanhauser-thc thc-hydraCVE-2026-56766 0 Hydra through 9.7, fixed in commit 9cc84c2, contains a stack buffer overflow in NTLM authentication across SMTP, POP3, IMAP, NNTP, HTTP, HTTP-Proxy, and HTTP-Proxy-Urlenum modules when processing malicious NTLM Type-2 challenges. A malicious server can send a crafted NTLM Type-2 challenge with an excessively long domain string, causing base64-encoded response data to overflow a 500-byte stack buffer by 18 to 330 bytes, enabling remote code execution on systems without stack protection. Join the discussion | CVE Database V5 | 06/25/2026, 18:01:07 UTC Added: 06/25/2026, 18:31:23 UTC |
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