SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability

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• NewsExploited · CISA KEVKnown ransomware useSmarterTools · SmarterMail

  SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability

  CVE-2026-24423

  SmarterTools SmarterMail contains a missing authentication for critical function vulnerability in the ConnectToHub API method. This could allow the attacker to point the SmarterMail instance to a malicious HTTP server which serves the malicious OS command and could lead to command execution.

  CISA's required action · due 26 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 · cve.org · nvd.nist.gov

  Added to KEV 5 Feb 2026 · Source checked 4 Nov 2026, 16:40 UTC · CISA KEV entry

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