Detections
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SmarterMail < 100.0.9511 Unauthenticated RCE via ConnectToHub API (CVE-2026-24423)

critical Nessus Plugin ID 298241

Synopsis

The remote mail server is affected by a remote code execution vulnerability.

Description

The version of SmarterTools SmarterMail installed on the remote host is prior to 100.0.9511. It is, therefore, affected by a remote code execution vulnerability. SmarterTools SmarterMail versions prior to build 9511 contain an unauthenticated remote code execution vulnerability in the ConnectToHub API method.
The attacker could point the SmarterMail to the malicious HTTP server, which serves the malicious OS command.
This command will be executed by the vulnerable application.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to SmarterTools SmarterMail version 100.0.9511 or later.

See Also

http://www.nessus.org/u?fe78a2a7

Plugin Details

Severity: Critical

ID: 298241

File Name: smartertools_smartermail_CVE-2026-24423.nasl

Version: 1.1

Type: remote

Family: CGI abuses

Published: 2/6/2026

Updated: 2/6/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.0

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-24423

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Vector: 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

Vulnerability Information

CPE: cpe:/a:smartertools:smartermail

Required KB Items: installed_sw/SmarterTools SmarterMail

Patch Publication Date: 1/22/2026

Vulnerability Publication Date: 1/22/2026

Reference Information

CVE: CVE-2026-24423