MSRXVulnerabilities / CVE-2026-24423
CVE-2026-24423
Published 2026-01-23 · Analyzed
CVE-2026-24423
SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-02-05, with a fix-by date of 2026-02-26. Patch it first.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
9.3 CRITICAL
CVSS 4.0 · CNA · vulncheck.com
CVSS 4.0 · CNA · vulncheck.com
88%
chance of exploitation in the next 30 days (EPSS; in the top 1% of all CVEs)
chance of exploitation in the next 30 days (EPSS; in the top 1% of all CVEs)
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.
Scores
Affected products
- smartertools smartermail: < 100.0.9511
Weakness: CWE-306
4 references (advisories, patches, write-ups)
- https://code-white.com/public-vulnerability-list/#systemadminsettingscontrollerconnecttohub-missing-authentication-in-smartermail · Third Party Advisory
- https://www.smartertools.com/smartermail/release-notes/current · Release Notes
- https://www.vulncheck.com/advisories/smartertools-smartermail-unauthenticated-rce-via-connecttohub-api · Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24423 · US Government Resource
Sources: NVD, CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.