CVE WatchSep 12, 2026

CVE-2026-84869

ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability

CVSS

9.9

Critical

EPSS

0.9%

p60

KEV

YES

Sep 11, 2026

Exploit Today

0-100

Published: Sep 8, 2026 · Last modified: Sep 12, 2026 · CWE-269 · CWE-862

EPSS · 30d

0.9%EPSS · 30 days0.9%

2026-09-252026-10-23

KEV catalog record

Product

ConnectWise / ScreenConnect

Vulnerability

ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability

Added to KEV

Sep 11, 2026

Remediate by

Sep 14, 2026

Known ransomware use

Summary 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.

Notes

https://www.connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletin ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-84869

Technical 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.

Official references

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