TI-2026-19133 Aliases CVE-2026-23760 GHSA-mj6x-679w-76wr

SmarterTools SmarterMail < Build 9511 Authentication Bypass via Password Reset API

CRITICAL 99Exploited in the wildCWE-288Published 2026-01-22 · Updated 2026-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-288.

Summary

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.

Why it matters now

Exploitation Active In CISA KEV since 2026-01-26CISA due date 2026-02-16Known ransomware use

EPSS 0.96432 99th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by the CNA and NVD

Fix Fixed SmarterMail (SmarterTools): 100.0.9511

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Active
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
SmarterTools	SmarterMail	before 100.0.9511	100.0.9511	Patch available	CNA

SmarterMail VendorSmarterTools Affected before 100.0.9511 Fixed in 100.0.9511 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:smartertools:smartermail::::::::	before 100.0.9511	Vulnerable	SmarterTools

cpe:2.3:a:smartertools:smartermail:*:*:*:*:*:*:*:* Versions before 100.0.9511 Vulnerable ·SmarterTools

Remediation

Fix · CNA SmarterMail (SmarterTools) Fixed in 100.0.9511

Timeline

2026-01-26 Added to CISA KEV
2026-10-02 Threatist record created from CVE-2026-23760
2026-10-03 Alias added: GHSA-mj6x-679w-76wr

References

Exploit 2

Patch 1

https://www.smartertools.com/smartermail/release-notes/current

Advisory 1

https://code-white.com/public-vulnerability-list/#authenticationserviceforceresetpassword-missing-authentication-in-smartermail

TI-2025-32755 Upload arbitrary files in SmarterTools SmarterMail KEVCVSS 3.1CRITICAL 10.0
TI-2026-19690 SmarterTools SmarterMail < Build 9511 Unauthenticated RCE via ConnectToHub API KEVCVSS 4.0CRITICAL 9.3
TI-2019-05110 SmarterTools SmarterMail 16.x before build 6985 allows deserialization of untrusted data. CVSS 3.0CRITICAL 9.8
TI-2019-05109 SmarterTools SmarterMail 16.x before build 6985 allows directory traversal. CVSS 3.0MEDIUM 6.5
TI-2021-12079 SmarterTools SmarterMail 16.x through 100.x before 100.0.7803 allows remote code execution. CVSS 3.1CRITICAL 9.8
TI-2026-06870 SmarterTools SmarterMail < Build 9560 Server Local File Inclusion via the /api/v1/report/summary/{type} API CVSS 4.0HIGH 8.7

See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences