CVE-2026-24423 PUBLISHED

SmarterTools SmarterMail < Build 9511 Unauthenticated RCE via ConnectToHub API

Assigner: VulnCheck
Reserved: 22.01.2026 Published: 23.01.2026 Updated: 24.01.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	SmarterTools
Product	SmarterMail
Versions	Default: unaffected affected from 0 to 100.0.9511 (excl.)

Credits

Sina Kheirkhah & Piotr Bazydlo of watchTowr finder
Markus Wulftange of CODE WHITE GmbH finder
Cale Black of VulnCheck finder

References

Problem Types

CWE-306 Missing Authentication for Critical Function CWE