MSRXCVE-2026-23760
CVE-2026-23760
SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVSS 4.0 · CNA · vulncheck.com
chance of exploitation in the next 30 days (EPSS; in the top 1% of all CVEs)
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.
Scores
Affected products
- smartertools smartermail: < 100.0.9511
Weakness: CWE-288
6 references (advisories, patches, write-ups)
- https://code-white.com/public-vulnerability-list/#authenticationserviceforceresetpassword-missing-authentication-in-smartermail · Third Party Advisory
- https://labs.watchtowr.com/attackers-with-decompilers-strike-again-smartertools-smartermail-wt-2026-0001-auth-bypass/ · Exploit, Third Party Advisory
- https://www.smartertools.com/smartermail/release-notes/current · Release Notes
- https://www.vulncheck.com/advisories/smartertools-smartermail-authentication-bypass-via-password-reset-api · Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-23760 · US Government Resource
- https://www.huntress.com/blog/smartermail-account-takeover-leading-to-rce · Exploit, Third Party Advisory
Sources: NVD, CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.