CVE-2026-23760
CISA KEVRansomwareAs of 2026-01-27, CVE-2026-23760 is a CVSS 9.8 (CRITICAL-severity) vulnerability. CISA KEV-listed (known exploited). EPSS exploitation probability 78.7%. Threadlinqs Intelligence tracks 2 threats exploiting it.
Last updated: 2026-01-27
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 v3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses (CWE)
CWE-288
Exploitation status
CISA KEV-listed (known exploited)
Threats tracking this CVE
- Storm-1175 Medusa Ransomware Zero-Day Exploitation Campaign (CVE-2026-23760, CVE-2025-10035) — CRITICAL
- SmarterMail Dual-CVE Pre-Auth RCE Chain — CVE-2026-23760 Admin Password Reset + CVE-2026-24423 ConnectToHub RCE, CISA KEV, Mass Automated Exploitation, 2-Day Patch Weaponization via .NET Decompiler — CRITICAL
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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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.