critical9.8Known exploited
CVE-2026-24423
SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-02-05. Federal due date: 2026-02-26.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Smartertools | Smartermail | before 100.0.9511 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://code-white.com/public-vulnerability-list/#systemadminsettingscontrollerconnecttohub-missing-authentication-in-smartermail
- https://www.smartertools.com/smartermail/release-notes/current
- https://www.vulncheck.com/advisories/smartertools-smartermail-unauthenticated-rce-via-connecttohub-api
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24423