SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability

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• NewsExploited · CISA KEVKnown ransomware useSmarterTools · SmarterMail

  SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability

  CVE-2025-52691

  SmarterTools SmarterMail contains an unrestricted upload of file with dangerous type vulnerability that could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.

  CISA's required action · due 16 Feb 2026 for U.S. federal civilian agencies

  Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  Cited by CISA: smartertools.com · csa.gov.sg · nvd.nist.gov

  Added to KEV 26 Jan 2026 · Source checked 4 Nov 2026, 16:40 UTC · CISA KEV entry

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