CVE-2026-23760

Name: CVE-2026-23760
Creator: NVD / NIST
Published: 2026-01-22T15:16:55.12+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10Actively ExploitedEPSS 96.27%

Last modified Jun 17, 2026

CVE-2026-23760 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 96.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

9.3/10

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

EPSS Probability

96.27%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Feb 16, 2026.

Weakness Enumeration

CWE-288

Affected Software

Vendor	Product	Versions
Smartertools	Smartermail	< 100.0.9511

References

https://code-white.com/public-vulnerability-list/#authenticationserviceforceresetpassword-missing-authentication-in-smartermailThird 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/currentRelease Notes
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

Timeline

Published: Jan 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-23760?

How severe is CVE-2026-23760?

CVE-2026-23760 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 96.27% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2026-23760?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-23760?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST