CVE-2026-23760SmarterTools SmarterMail < Build 9511 Authentication Bypass via Password Reset API
Updated under an hour ago ()
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It affects SmarterTools SmarterMail. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jan 26, 2026; federal agencies had to remediate by Feb 16, 2026, and it is known to be used in ransomware. Treat that date as your deadline.
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Free account, 1 product
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
- 9.3 CRITICAL (v4.0, CNA)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
- Weakness (CWE)
- CWE-288
- Known exploited
- Added to CISA KEV Jan 26, 2026; federal remediation due Feb 16, 2026; known ransomware useApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 96.54% (percentile 100)
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Aug 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
SmarterTools SmarterMail smartertools:smartermail (from the name) | before 100.0.9511 | CNA record |
smartertools smartermail smartertools:smartermail | before 100.0.9511 | NVD |
References
- https://www.smartertools.com/smartermail/release-notes/currentrelease-notes, patch
- https://labs.watchtowr.com/attackers-with-decompilers-strike-again-smartertools-smartermail-wt-2026-0001-auth-bypass/technical-description, exploit, third-party-advisory
- https://code-white.com/public-vulnerability-list/#authenticationserviceforceresetpassword-missing-authentication-in-smartermailthird-party-advisory
- https://www.vulncheck.com/advisories/smartertools-smartermail-authentication-bypass-via-password-reset-apithird-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-23760us-government-resource
- https://www.huntress.com/blog/smartermail-account-takeover-leading-to-rceexploit, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.