{"id":"CVE-2026-84869","aliases":["EUVD-2026-74053","GHSA-rc8v-f46m-jcgm"],"status":"published","title":"ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions","description":"A condition in the ScreenConnect client may allow files to be transferred and executed through an active remote session without authorization or Host confirmation in certain circumstances. ScreenConnect servers are not impacted.","severity":{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00924,"percentile":0.60908,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-269","CWE-862"],"published":"2026-09-08T19:29:33Z","modified":"2026-09-12T04:16:42Z","kev":{"date_added":"2026-09-11","due_date":"2026-09-14","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-09-11"},{"source":"kev","since":"2026-09-11"}],"products":[{"vendor":"connectwise","product":"screenconnect"}],"references":[{"url":"https://www.connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletin","tags":["Vendor Advisory"]},{"url":"https://github.com/ConnectWise-Advisories/Disclosures/tree/main/CVE-2026-84869","tags":["Third Party Advisory"]},{"url":"https://www.connectwise.com/company/trust/advisories","tags":["Vendor Advisory"]},{"url":"https://www.huntress.com/blog/rogue-screenconnect-installations","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-84869","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84869"},{"url":"https://github.com/advisories/GHSA-rc8v-f46m-jcgm"}],"sources":{"cve":[{"id":"CVE-2026-84869","title":"ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions","description":"A condition in the ScreenConnect client may allow files to be transferred and executed through an active remote session without authorization or Host confirmation in certain circumstances. ScreenConnect servers are not impacted.","status":"published","published":"2026-09-08T19:29:33.63Z","modified":"2026-09-12T03:55:19.45Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-862","CWE-269"],"updated_at":"2026-11-02T14:20:08.734143Z"}],"euvd":[{"id":"EUVD-2026-74053","description":"A condition in the ScreenConnect client may allow files to be transferred and executed through an active remote session without authorization or Host confirmation in certain circumstances. ScreenConnect servers are not impacted.","status":"published","published":"2026-09-08T19:29:33Z","modified":"2026-09-12T03:55:19Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"exploited_since":"2026-09-11","updated_at":"2026-11-02T17:28:21.886667Z"}],"ghsa":[{"id":"GHSA-rc8v-f46m-jcgm","title":"A condition in the ScreenConnect client may allow files to be transferred and executed through an...","description":"A condition in the ScreenConnect client may allow files to be transferred and executed through an active remote session without authorization or Host confirmation in certain circumstances. ScreenConnect servers are not impacted.","status":"published","published":"2026-09-08T21:34:29Z","modified":"2026-09-11T21:31:17Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:11:45.091927Z"}],"kev":[{"id":"CVE-2026-84869","title":"ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability","description":"ConnectWise ScreenConnect contains both an improper privilege management and missing authorization vulnerability that may allow an attacker to transfer and execute files through an active remote session without authorization or host confirmation.","cwes":["CWE-269","CWE-862"],"kev":{"date_added":"2026-09-11","due_date":"2026-09-14","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-84869","description":"A condition in the ScreenConnect client may allow files to be transferred and executed through an active remote session without authorization or Host confirmation in certain circumstances. ScreenConnect servers are not impacted.","status":"published","published":"2026-09-08T20:18:51.147Z","modified":"2026-09-12T04:16:42.757Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-269","CWE-862"],"updated_at":"2026-11-02T14:12:45.612639Z"}]}}