CVE-2026-25067 — SmarterTools SmarterMail < Build 9518 Unauthenticated background-of-the-day Path Coercion
SmarterTools SmarterMail versions prior to build 9518 contain an unauthenticated path coercion vulnerability in the background-of-the-day preview endpoint. The application base…
Published: 2026-01-29 · CVSS: 6.9 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7