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Weakness (CWE) CWE-121 Stack-based Buffer Overflow 1

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TI-2026-40930 CVE-2026-56766 · GHSA-3r6x-6cp5-6575

Hydra - Stack Buffer Overflow in NTLM Authentication Handler

Priority MEDIUM 44

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 ch…

CVSS 4.0HIGH 8.6· Network · No auth · User interaction · EPSS 0.02438 · Published 2026-06-25 · Fixed CWE-121

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