September 11, 2026 · Applied Cybernetics Group
CVE-2026-84869 — ConnectWise ScreenConnect
ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability
- Added to KEV
2026-09-11- Federal due date
2026-09-14- Vendor
- ConnectWise
- Product
- ScreenConnect
- EPSS
- 51.1th percentile (score 0.007, as of
2026-09-16) - NVD CVSS v3.1
- 9.9 (CRITICAL)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2026-84869
CISA short 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.
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.
NVD 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.