ConnectWise · ScreenConnect
CVE-2026-84869
ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions
What it is
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.
CISA: 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.
What to do
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.
Deadline for US federal agencies: September 14, 2026
More exploited flaws from ConnectWise
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Apr 28, 2026 | Path Traversal | ScreenConnect | High 8.4 | 95% |
| Jun 2, 2025 | Improper Authentication | ScreenConnect | High 8.1 | 3.6% |
| Feb 22, 2024 | Authentication Bypass | ScreenConnect | Critical 10.0 | >99.9% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.