CVE-2026-24423: SmarterTools SmarterMail < Build 9511 Unauthenticated RCE via ConnectToHub API
In CISA’s Known Exploited Vulnerabilities catalog: SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability.
Added , federal remediation due . Known ransomware use: Known.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · CWE-306
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
SmarterTools: SmarterMail
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- code-white.com/public-vulnerability-list/ (opens in new tab)
- www.smartertools.com/smartermail/release-notes/current (opens in new tab)
- www.vulncheck.com/advisories/smartertools-smartermail-unauthenticated-rce-via-connectto… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)