CVE-2026-84869: ConnectWise ScreenConnect

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

EPSS<1% · P32

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

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

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 1 of September 2026 (September 7 – 13)
GitLab CVSS 10 exploited in wild; Microsoft ships 974 patches; Claude abused by state actors (2026-09-12)

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.