CVE-2026-24423—SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability

Vulnerability Name

SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability

Description

SmarterTools SmarterMail contains a missing authentication for critical function vulnerability in the ConnectToHub API method. This could allow the attacker to point the SmarterMail instance to a malicious HTTP server which serves the malicious OS command and could lead to command execution.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:

KNOWN

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.

Additional Notes

• https://www.smartertools.com/smartermail/release-notes/current
• https://www.cve.org/CVERecord?id=CVE-2026-24423
• https://nvd.nist.gov/vuln/detail/CVE-2026-24423

Related News Articles

• Warlock Ransomware Breaches SmarterTools Through Unpatched SmarterMail ServerFebruary 10, 2026
• Hackers breach SmarterTools network using flaw in its own softwareFebruary 9, 2026
• Ransomware group breached SmarterTools via flaw in its SmarterMail deploymentFebruary 9, 2026
• CISA warns of SmarterMail RCE flaw used in ransomware attacksFebruary 6, 2026

Related Weaknesses

• CWE-306