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Not yet scored Actively exploited Used in ransomware

CVE-2026-24423

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.

Recommended 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.

CISA remediation due date for U.S. federal agencies: 26 Feb 2026.

Collected automatically from public sources. Verify affected versions and fixes in the vendor's notice before acting.