{"id":"CVE-2026-24423","aliases":["EUVD-2026-4273","GHSA-7jpw-fm5p-f98m"],"status":"published","title":"SmarterTools SmarterMail \u003c Build 9511 Unauthenticated RCE via ConnectToHub API","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.","severity":{"version":"4.0","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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.88177,"percentile":0.99771,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-306"],"published":"2026-01-23T16:53:34Z","modified":"2026-08-04T05:16:38Z","kev":{"date_added":"2026-02-05","due_date":"2026-02-26","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Known"},"exploitation":[{"source":"euvd","since":"2026-02-05"},{"source":"kev","since":"2026-02-05"}],"exploits":[{"source":"pocgithub","id":"aavamin/CVE-2026-24423","title":"aavamin/CVE-2026-24423","date":"2026-01-29","url":"https://github.com/aavamin/CVE-2026-24423"},{"source":"pocgithub","id":"CyberAlp0/SmarterMail-CVE-2026-24423","title":"CyberAlp0/SmarterMail-CVE-2026-24423","date":"2026-09-02","url":"https://github.com/CyberAlp0/SmarterMail-CVE-2026-24423"},{"source":"nuclei","id":"CVE-2026-24423","title":"SmarterMail - Remote Code Execution","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-24423.yaml"}],"products":[{"vendor":"smartertools","product":"smartermail"},{"vendor":"smartertools inc.","product":"smartermail"}],"references":[{"url":"https://www.smartertools.com/smartermail/release-notes/current","tags":["release-notes","patch","Release Notes"]},{"url":"https://code-white.com/public-vulnerability-list/#systemadminsettingscontrollerconnecttohub-missing-authentication-in-smartermail","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://www.vulncheck.com/advisories/smartertools-smartermail-unauthenticated-rce-via-connecttohub-api","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24423","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24423"},{"url":"https://github.com/advisories/GHSA-7jpw-fm5p-f98m"}],"sources":{"cve":[{"id":"CVE-2026-24423","title":"SmarterTools SmarterMail \u003c Build 9511 Unauthenticated RCE via ConnectToHub API","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.","status":"published","published":"2026-01-23T16:53:34.951Z","modified":"2026-08-04T03:56:04.225Z","cvss":[{"version":"4.0","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","level":"critical","assessor":"cna"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:19:50.92611Z"}],"euvd":[{"id":"EUVD-2026-4273","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.","status":"published","published":"2026-01-23T16:53:34Z","modified":"2026-08-04T03:56:04Z","cvss":[{"version":"4.0","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","level":"critical"}],"exploited_since":"2026-02-05","updated_at":"2026-11-02T18:02:23.332335Z"}],"ghsa":[{"id":"GHSA-7jpw-fm5p-f98m","title":"SmarterTools SmarterMail versions prior to build 9511 contain an unauthenticated remote code...","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.","status":"published","published":"2026-01-23T18:31:30Z","modified":"2026-02-06T18:30:29Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:06:04.731011Z"}],"kev":[{"id":"CVE-2026-24423","title":"SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability","description":"SmarterTools SmarterMail contains a missing authentication for critical function vulnerability in the ConnectToHub API method. This could allow the attacker to point the SmarterMail instance to a malicious HTTP server which serves the malicious OS command and could lead to command execution. ","cwes":["CWE-306"],"kev":{"date_added":"2026-02-05","due_date":"2026-02-26","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-24423","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.","status":"published","published":"2026-01-23T17:16:13.483Z","modified":"2026-08-04T05:16:38.32Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:12:04.423757Z"}]}}