PT-2026-3941 · Smartertools · Smartermail

Markus Wulftange

+2

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Published

2026-01-15

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Updated

2026-04-07

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CVE-2026-23760

CVSS v2.0

10

Critical

AV:N/AC:L/Au:N/C:C/I:C/A:C
Name of the Vulnerable Software and Affected Versions SmarterTools SmarterMail versions prior to build 9511
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. 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. This vulnerability has been actively exploited in the wild, with reports of Warlock ransomware operators gaining access through this flaw and moving laterally within networks. Approximately 6,000 instances have been identified as potentially vulnerable. The vulnerability is accessible via the /api/v1/admin/force-reset-password endpoint.
Recommendations Upgrade to build 9511 or later immediately. Restrict API access via IP allowlisting. Deploy a Web Application Firewall (WAF) for the /force-reset-password endpoint. Implement geo-blocking for admin interfaces. Review access logs for external POST requests, unauthorized admin changes, and new account creations. Rotate exposed credentials.

Exploit

Fix

LPE

RCE

Authentication Bypass Using an Alternate Path or Channel

Weakness Enumeration

CWE-288

Related Identifiers

BDU:2026-00824
CVE-2026-23760

Affected Products

Smartermail