CVE detail
CVE-2026-24423: SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
SmarterTools · SmarterMail
- Date added (KEV)
- Feb 05, 2026
- CISA due date
- Feb 26, 2026
- Ransomware campaign use
- Known
Required 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.
Scorifya interpretation
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Plain English
Technical detail
From CISA
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.
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
See what attackers can see on your domain
This vulnerability is on CISA's Known Exploited Vulnerabilities list, so it is being exploited in the wild right now, including in ransomware campaigns. Scorifya can't test for SmarterTools directly, but in about 30 seconds it shows what your own domain exposes publicly across TLS, security headers, DNS, and cookies: the surface attackers probe first.
SOC 2 compliance
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See Scorifya Controls →References
- https://code-white.com/public-vulnerability-list/#systemadminsettingscontrollerconnecttohub-missing-authentication-in-smartermailThird Party Advisory
- https://www.smartertools.com/smartermail/release-notes/currentRelease Notes
- https://www.vulncheck.com/advisories/smartertools-smartermail-unauthenticated-rce-via-connecttohub-apiThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24423US Government Resource
Other recent CVEs from SmarterTools
- CVE-2025-52691SmarterMail, SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
- CVE-2026-23760SmarterMail, SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability