CVE-2026-24423

CriticalCVSS 9.8/10Known exploited (CISA KEV)Last modified Aug 4, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Jan 23, 2026
Last modified
Aug 4, 2026
Added to CISA KEV
Feb 5, 2026
NVD status
Analyzed

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CVE-2026-24423: Critical severity, CVSS 9.8 | Vulnix