CVE-2026-24423 — SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
CVE-2026-24423: SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | SmarterTools |
| Product | SmarterMail |
| Date added | 2026-02-05 |
| Due date | 2026-02-26 |
| Ransomware campaign use | Known |
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
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
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-24423
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog