CVE-2026-24423

critical

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.

References

https://www.vulncheck.com/advisories/smartertools-smartermail-unauthenticated-rce-via-connecttohub-api

https://code-white.com/public-vulnerability-list/#systemadminsettingscontrollerconnecttohub-missing-authentication-in-smartermail

https://thehackernews.com/2026/02/warlock-ransomware-breaches.html

https://www.securityweek.com/smartertools-hit-by-ransomware-via-vulnerability-in-its-own-product/

https://www.helpnetsecurity.com/2026/02/09/smartertools-breach-smartermail-vulnerability/

https://www.bleepingcomputer.com/news/security/hackers-breach-smartertools-network-using-flaw-in-its-own-software/

https://www.securityweek.com/critical-smartermail-vulnerability-exploited-in-ransomware-attacks/

https://www.helpnetsecurity.com/2026/02/06/ransomware-smartermail-cve-2026-24423/

https://www.bleepingcomputer.com/news/security/cisa-warns-of-smartermail-rce-flaw-used-in-ransomware-attacks/

https://securityaffairs.com/187675/security/u-s-cisa-adds-smartertools-smartermail-and-react-native-community-cli-flaws-to-its-known-exploited-vulnerabilities-catalog.html

https://www.cisa.gov/news-events/alerts/2026/02/05/cisa-adds-two-known-exploited-vulnerabilities-catalog

https://thehackernews.com/2026/01/smartermail-fixes-critical.html

https://securityaffairs.com/187496/security/smartertools-patches-critical-smartermail-flaw-allowing-code-execution.html

https://www.smartertools.com/smartermail/release-notes/current

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24423

Details

Source: Mitre, NVD

Published: 2026-01-23

Updated: 2026-02-06

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

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

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

CVSS v4

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

Severity: Critical

EPSS

EPSS: 0.2265