OS Command Injection in SmarterMail - CVE-2026-24423
Published: February 6, 2026 / Updated: September 4, 2026
Vulnerability identifier: #VU122426
CSH Severity: Critical
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-24423
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to missing authentication in the ConnectToHub API method. A remote non-authenticated attacker can send a specially crafted HTTP request and execute arbitrary OS commands on the system.
Affected software
SmarterMail
How to mitigate CVE-2026-24423
Install updates from vendor's website.
SmarterMail - update to 100.0.9511