CVE Watchtower

CVE-2026-84869Connectwise Screenconnect Improper Privilege Management

NVDCVSS scored by 7d616e1a-3288-43b1-a0dd-0a65d3e70a49

Vulnerability 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.
Severity Level
CRITICAL(9.9)
Published Date
Sep 8, 2026
Last Modified
Sep 12, 2026
Exploitation Status
ACTIVE
EPSS Score (30-Day)
0.92%Probability
Root Weakness (CWE)
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control.
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVSS v3.1 Base Metrics — Score 9.9 (CRITICAL)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Connectwise Screenconnect < 26.6.5.9742
Patched Versions
  • Connectwise Screenconnect 26.6.5.9742

What to do

Patch now. CISA lists this flaw as exploited in the wild and set a federal remediation deadline of Sep 14, 2026.

  1. Check whether you run Connectwise Screenconnect and which version.
  2. Update to a patched version listed above, then confirm the new version.
  3. Review logs and exposed services for signs of earlier compromise.

CISA 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.

CISA KEV Status

Listed in Known Exploited Vulnerabilities
Added: Sep 11, 2026
Remediation due: Sep 14, 2026 (deadline passed)

Timeline

  • Sep 8, 2026Published
  • Sep 11, 2026Added to CISA KEV catalog
  • Sep 12, 2026Record last modified
  • Sep 14, 2026KEV remediation due date

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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Data last checked: Nov 13, 2026 21:28 UTC