CVE-2026-23760
SmarterTools SmarterMail < Build 9511 Authentication Bypass via Password Reset API
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.
- Affected
- SmarterTools · SmarterMail
- CVSS v4.0 VULNCHECK
- 9.3 CRITICAL
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 - CVSS v3.1 NVD
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS
- 96.43% chance of exploitation in the next 30 days, 100th percentile
- CISA KEV
- added 2026-01-26, used in ransomware campaigns
- Nuclei
- critical
- Published
- 2026-01-22
- Updated
- 2026-08-04
Proof-of-concept exploits (2)
- https://labs.watchtowr.com/attackers-with-decompilers-strike-again-smartertools-smarterma…
- MaxMnMl/smartermail-CVE-2026-23760-poc8★ · 2026-01-24
Nuclei templates (1)
Security advisories
- https://code-white.com/public-vulnerability-list/#authenticationserviceforceresetpassword…
- https://labs.watchtowr.com/attackers-with-decompilers-strike-again-smartertools-smarterma…
- https://www.huntress.com/blog/smartermail-account-takeover-leading-to-rce
- https://www.vulncheck.com/advisories/smartertools-smartermail-authentication-bypass-via-p…
- https://www.smartertools.com/smartermail/release-notes/current