What’s Vulnerable › Vulnerabilities

CVE-2026-23760: SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-01-26
• EPSS: 96.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-22 · updated 2026-08-04
• Weakness: CWE-288

Description

SmarterTools SmarterMail versions prior to build 9511 contain an authentication bypass 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. An unauthenticated attacker can supply a target administrator username and a new password to reset the account, resulting in full administrative compromise of the SmarterMail instance. NOTE: SmarterMail system administrator privileges grant the ability to execute operating system commands via built-in management functionality, effectively providing administrative (SYSTEM or root) access on the underlying host.

Affected products

• SmarterTools SmarterMail: before 100.0.9511 — fixed in 100.0.9511

How to fix

Upgrade to a fixed version: SmarterTools SmarterMail 100.0.9511. Check the vendor advisory for mitigations.

References

• https://code-white.com/public-vulnerability-list/#authenticationserviceforceresetpassword-missing-authentication-in-smartermail
• https://labs.watchtowr.com/attackers-with-decompilers-strike-again-smartertools-smartermail-wt-2026-0001-auth-bypass/
• https://www.smartertools.com/smartermail/release-notes/current
• https://www.vulncheck.com/advisories/smartertools-smartermail-authentication-bypass-via-password-reset-api
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-23760
• https://www.huntress.com/blog/smartermail-account-takeover-leading-to-rce

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