CVE Watch14 jul 2026

CVE-2026-56766

Hydra through 9.7, fixed in commit 9cc84c2, contains a stack buffer overflow in NTLM authentication across SMTP, POP3, IMAP, NNTP, HTTP, HTT

CVSS

8.8

Alto

EPSS

1.3%

p68

KEV

—

Exploit Today

0-100

Publicado: 25 jun 2026 · Última mod.: 14 jul 2026 · CWE-121

EPSS · 30d

0.5%EPSS · 30 días1.3%

2026-06-302026-07-16

Descripción técnica

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.

Referencias oficiales

CVEs relacionados

CVECVSSEPSSKEVRExplotTítuloVis.

CVE-2025-510878.6 ALT

94.0%

——28Tenda AC8V4 V16.03.34.06` was discovered to contain stack overflow at /goform/saveParentControlInfo. The manipulation of the argument time leads to stack-based buffer overflow.12d CVE-2025-510885.3 MED

92.6%

——28Tenda AC8V4 V16.03.34.06` was discovered to contain stack overflow at /goform/WifiGuestSet. The manipulation of the argument `shareSpeed` leads to stack-based buffer overflow.12d CVE-2025-510855.3 MED

92.6%

——28Tenda AC8V4 V16.03.34.06` was discovered to contain stack overflow at /goform/SetSysTimeCfg. The manipulation of the argument `timeZone` and `timeType` leads to stack-based buffer overflow.12d CVE-2025-606908.8 ALT

89.1%

——27A stack-based buffer overflow exists in the get_merge_ipaddr function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). The function concatenates up to four user-supplied CGI parameters matching <parameter>_0~3 into a fixed-size buffer (a2) without bounds checking. Remote attackers can exploit this vulnerability via specially crafted HTTP requests to execute arbitrary code or cause denial of service without authentication.12d CVE-2026-248818.1 ALT

75.2%

——23In GnuPG before 2.5.17, a crafted CMS (S/MIME) EnvelopedData message carrying an oversized wrapped session key can cause a stack-based buffer overflow in gpg-agent during PKDECRYPT--kem=CMS handling. This can easily be leveraged for denial of service; however, there is also memory corruption that could lead to remote code execution.2d CVE-2026-503877.8 ALT

75.0%

——22Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges locally.1d