CVE-2026-24423 — SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
2026-02-05 • CISA Known Exploited Vulnerability
[event] 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 SOFTWARE
| Field | Value |
|---|---|
| Vendor | SmarterTools |
| Product | SmarterMail |
| CWE | CWE-306 |
| CVE ID | CVE-2026-24423 |
| Date Added | 2026-02-05 |
| Due Date | 2026-02-26 |
| Ransomware Campaign | Known — this vulnerability has been leveraged in ransomware campaigns |
> MITIGATION
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due Date: 2026-02-26