Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-25067

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 9.6%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-25067


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