SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability

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• NewsExploited · CISA KEVKnown ransomware useSmarterTools · SmarterMail

  SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability

  CVE-2026-23760

  SmarterTools SmarterMail contains an authentication bypass using an alternate path or channel vulnerability in the password reset API. The force-reset-password endpoint permits anonymous requests and fails to verify the existing password or a reset token when resetting system administrator accounts. This could allow an unauthenticated attacker to supply a target administrator username and a new password to reset the account, resulting in full administrative compromise of the SmarterMail instance.

  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 · nvd.nist.gov

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

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