CVE-2026-23760

CRITICAL CISA KEV EPSS 99.9%
Published Jan 22, 20265mo ago · Modified Jun 17, 20261w ago
9.3 CVSS 4.0
Critical
Find Similar
Published Jan 22, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago
KEV Listed Jan 26, 2026 5mo ago
KEV Due Feb 16, 2026 135d overdue

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.

CVSS Details

Base Score
9.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

CISA Known Exploited Overdue 135d
Added
Jan 26, 2026
Due
Feb 16, 2026

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EPSS Exploit Probability
99.9% percentile
Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available

Weaknesses 1

CWE-288

Affected Products 1

VendorProductVersionRange
smartertoolssmartermail* <100.0.9511

References 6

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.