CISA Known Exploited Vulnerability
This vulnerability is actively exploited in the wild and listed in the CISA Known Exploited Vulnerabilities catalog.
Remediation Deadline: Feb 26, 2026
High
CISA KEVRansomwareCVE-2026-24423
SmarterTools—SmarterMail
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
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
Vulnerability Overview
- Severity
- High
- CISA KEV
- Yes
- Ransomware
- Known
- Published
- Feb 5, 2026
- KEV Added
- Feb 5, 2026
- Due Date
- Feb 26, 2026
- Related Articles
- 0
Vendor
SmarterTools
SmarterMail