SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA deadline 2026-02-16 · passed 6 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
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.
Who is affected
SmarterTools SmarterMail. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-288.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 6 months ago
Sources
- NVD entry for CVE-2026-23760 nvd.nist.gov/vuln/detail/CVE-2026-23760
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- smartertools.com www.smartertools.com/smartermail/release-notes/current
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2026-23760