CVE-2026-23760
SmarterTools SmarterMail
Published 22 Jan 2026 · updated 4 Aug 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 26 Jan 2026, with a remediation deadline of 16 Feb 2026 for US federal agencies. It has been used in ransomware campaigns.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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.
References
- code-white.com/public-vulnerability-list/#authenticationserviceforceresetpassword-missing-authentication-in-smartermail · Third Party Advisory
- labs.watchtowr.com/attackers-with-decompilers-strike-again-smartertools-smartermail-wt-2026-0001-auth-bypass/ · Exploit, Third Party Advisory
- www.smartertools.com/smartermail/release-notes/current · Release Notes
- www.vulncheck.com/advisories/smartertools-smartermail-authentication-bypass-via-password-reset-api · Third Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-23760 · US Government Resource
- www.huntress.com/blog/smartermail-account-takeover-leading-to-rce · Exploit, Third Party Advisory