# CVE-2026-24423

## Summary

- **CVE ID:** CVE-2026-24423
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (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)
- **CWE:** CWE-306
- **Published:** Jan 23, 2026
- **Last Modified:** Aug 4, 2026

## Description

SmarterTools SmarterMail versions prior to build 9511 contain an unauthenticated remote code execution vulnerability in the ConnectToHub API method. The attacker could point the SmarterMail to the malicious HTTP server, which serves the malicious OS command. This command will be executed by the vulnerable application.

## Affected Products

- SmarterTools — SmarterMail (0)

## References

- [CNA](https://www.smartertools.com/smartermail/release-notes/current)
- [CNA](https://code-white.com/public-vulnerability-list/#systemadminsettingscontrollerconnecttohub-missing-authentication-in-smartermail)
- [CNA](https://www.vulncheck.com/advisories/smartertools-smartermail-unauthenticated-rce-via-connecttohub-api)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24423)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 87.69%
- **EPSS Percentile:** 99.7

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Feb 5, 2026
- **Due Date:** Feb 26, 2026

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._