CVE-2026-24423 KEV
9.8
CRITICAL · CVSS 3.1 · EPSS 88.2% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2026-02-26.
Description
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 88.18% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-306 |
| On CISA KEV | yes — remediate by 2026-02-26 |
| Public exploit | none known |
| Published | 2026-01-23 |
| Last modified | 2026-08-04 |
CISA KEV
| Name | SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability |
|---|---|
| Added | 2026-02-05 |
| Due | 2026-02-26 |
| Vendor / product | SmarterTools / SmarterMail |
| Ransomware use | known |
Affected (1)
| Vendor | Product |
|---|---|
| smartertools | smartermail |
References
- https://code-white.com/public-vulnerability-list/#systemadminsettingscontrollerconnecttohub-missing-authentication-in-smartermail
- https://www.smartertools.com/smartermail/release-notes/current
- https://www.vulncheck.com/advisories/smartertools-smartermail-unauthenticated-rce-via-connecttohub-api
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24423
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