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CVE-2026-84869

ConnectWise ScreenConnect•CRITICAL · CVSS 9.9• In the wild In CISA KEV

What is CVE-2026-84869?

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.

CVSS9.9 NVD 3.1
SeverityCRITICAL
Exploitation In the wild In CISA KEV
EPSS1% · P60
Triage statusActive Exploit
ActionPatch immediately
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWECWE-269
NVD published2026-09-08
NVD last modified2026-09-12

Timeline

  • 2026-09-08Published to the U.S. National Vulnerability Database (NVD)
  • 2026-09-11Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
  • 2026-09-12First covered in a defend.network daily briefing
  • 2026-09-12NVD record last updated
  • 2026-09-14CISA federal remediation deadline (BOD 22-01)

CISA Known Exploited Vulnerability

ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability

Added to KEV2026-09-11
Federal patch deadline2026-09-14
Known ransomware useUnknown

Affected product

ConnectWise ScreenConnect

Remediation Steps

  1. Apply the vendor security update for Connectwise Screenconnect as a priority.
  2. Restrict network exposure of the affected service to trusted sources until patched.
  3. Review logs and detections for indicators of exploitation.
  4. Confirm fixed versions against the official vendor advisory before deploying.

References

Referenced in our briefings & reports

Related vulnerabilities

Browse all tracked CVEs in the defend.network CVE database →

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.