CVE-2026-84869
ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions
ConnectWise·ScreenConnect
- Added
- Sep 11, 2026
- Fix due
- Sep 14, 2026
- Ransomware
- Not known
- Published
- Sep 8, 2026
- Updated
- Sep 12, 2026
- First covered
- Sep 12, 2026
- Latest story
- 2 months ago
Summary
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.
CWE-862Missing Authorization
Attack profile
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HCISA 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.
Affected products
- ConnectWise ScreenConnectAll versions prior to 26.6.5