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Critical · 9.3 Known exploited · Ransomware Scanner template Public exploit CVE-2026-24423 EUVD-2026-4273GHSA-7jpw-fm5p-f98m

SmarterTools SmarterMail < Build 9511 Unauthenticated RCE via ConnectToHub API

Published Jan 23, 2026 · Updated Aug 4, 2026 · Assigned by VulnCheck

Vendor: SmarterTools Product: SmarterMail

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.

Affected products

VendorProductAffectedFixed
SmarterTools SmarterMail < 100.0.9511 100.0.9511

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 2 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Advisories 2

References