CVE-2026-24423
SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
What the flaw is
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.
Description as published by CISA. We have not independently reproduced it.
What CISA requires
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
This deadline is binding on US federal civilian agencies under BOD 22-01. It is not a legal deadline for anyone else, but it is a useful urgency signal — CISA sets it by how actively the flaw is being used, not by CVSS.
Public exploit code
We hold no public exploit references for this CVE. That means our dataset has none — it is not evidence that no exploit exists. CISA has confirmed this vulnerability is being exploited in the wild regardless.
Vendor advisories
Primary sources
Was this page helpful?
If something here is wrong or out of date, tell us and we will check the source.
Thanks — that is recorded.
Other SmarterTools entries
See allSource: CISA KEV catalog · last verified July 31, 2026. Rebuilt automatically twice a day.