CVE Watch8 oct 2026

CVE-2026-103010

Heap-based buffer overflow in the legacy Blowfish decryption routine (BlowFishEncryptor::DecryptFromString) in Progressive Robot hMailServer

CVSS

7.8

Alto

EPSS

0.2%

KEV

—

Exploit Today

0-100

Publicado: 8 oct 2026 · Última mod.: 8 oct 2026 · CWE-122

EPSS · 30d

0.2%EPSS · 30 días0.2%

2026-10-092026-10-25

Descripción técnica

Heap-based buffer overflow in the legacy Blowfish decryption routine (BlowFishEncryptor::DecryptFromString) in Progressive Robot hMailServer 6.0.0 through 6.3.3 on Windows allows a local interactive user with no hMailServer credentials to write bytes of their choosing past the end of a 255-byte heap buffer in the hMailServer service process, which runs as LocalSystem by default. The user does this by passing a long hexadecimal string to the COM method Utilities.BlowfishDecrypt, which checked no authentication. The routine converted hexadecimal input of any length into a fixed 255-byte buffer before decrypting it in place. The result is a denial of service (service crash), and possibly code execution with the privileges of the service account.

Referencias oficiales

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