CVE-2026-25067 | BDVDB-2026-313009 Detail

Description#

SmarterTools SmarterMail versions prior to build 9518 contain an unauthenticated path coercion vulnerability in the background-of-the-day preview endpoint. The application base64-decodes attacker-supplied input and uses it as a filesystem path without validation. On Windows systems, this allows UNC paths to be resolved, causing the SmarterMail service to initiate outbound SMB authentication attempts to attacker-controlled hosts. This can be abused for credential coercion, NTLM relay attacks, and unauthorized network authentication.

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Exploit#

History#

1. Version 12026-01-29Record published in the CVE List.
2. Version 22026-03-05Most recent update recorded in the CVE List.