Cyber Threat Intelligence
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CRITICAL · CVSS 9.9 CISA Known Exploited Vulnerability

CVE-2026-84869

ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability

ConnectWise ScreenConnect

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.

CVSS
9.9
CRITICAL
EPSS
0.7%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
8 Sep 2026
CWE-269, CWE-862

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 11 September 2026. US federal agencies were required to remediate it by 14 September 2026.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 0.7%, which is higher than 51.1% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Frequently asked questions

Is CVE-2026-84869 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2026-84869.

What does CVE-2026-84869 affect?

CVE-2026-84869 affects ConnectWise ScreenConnect. 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.

How severe is CVE-2026-84869?

CVE-2026-84869 is rated CRITICAL with a CVSS base score of 9.9. EPSS puts the probability of exploitation in the next 30 days at 0.7%, higher than 51.1% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 14 September 2026.

How should organisations respond to CVE-2026-84869?

Apply the vendor patch for ConnectWise ScreenConnect as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.