CVE-2026-25067: medium-severity vulnerability in SmarterTools SmarterMail
SmarterTools SmarterMail < Build 9518 Unauthenticated background-of-the-day Path Coercion
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.9epss 0.3%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
SmarterTools · SmarterMailRelated CVEs — SmarterTools SmarterMail
In the same product, most dangerous first.
CVE-2026-23760CRITICALSmarterTools SmarterMail < Build 9511 Authentication Bypass via Password Reset APIEPSS 96.4%KEVCVE-2026-24423CRITICALSmarterTools SmarterMail < Build 9511 Unauthenticated RCE via ConnectToHub APIEPSS 88.2%KEVCVE-2025-52691CRITICALUpload Arbitrary FilesEPSS 85.7%KEVCVE-2026-26930HIGHCVE-2026-26930EPSS 0.3%