Vulnerability Intelligence Report
SmarterTools SmarterMail < Build 9511 Unauthenticated RCE via ConnectToHub API
CVE-2026-24423
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.
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.3
CRITICAL
EPSS Probability:87.69%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-306 ↗CWE-306 Missing Authentication for Critical Function
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| SmarterTools | SmarterMail | 0 < 100.0.9511 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
87.693%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VulnCheck · Bug Bounty Provider · USA |
| Reserved | 2026-01-22T18:21:46 |
| Published | 2026-01-23T16:53:34 |
| Last Updated | 2026-08-04T03:56:04 |
Community Chatter & Buzz