CVE-2026-24423

high-risk
Published 2026-01-23

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.

Do I need to act?

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66.4% chance of exploitation in next 30 days
EPSS score — higher than 34% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Smartertools

References (4)

Third Party Advisory https://code-white.com/public-vulnerability-list/#systemadminsettingscontrollerc...
Release Notes https://www.smartertools.com/smartermail/release-notes/current
Third Party Advisory https://www.vulncheck.com/advisories/smartertools-smartermail-unauthenticated-rc...
US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-...
63
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 26/34 · High
Exposure 5/34 · Minimal