ConnectWise ScreenConnect's Improper Privilege Management and Missing Authorization Allow Unauthenticated Attackers to Gain Administrative Control of the Remote Support Platform; CISA's September 14th KEV Deadline Has Passed

Last refreshed2026-09-27

Status: KEV | Advisory ID: CVE-2026-84869

Key Details

CVE	CVE-2026-84869
Vulnerability Name	ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability
CVSS Score / Version	9.9 (Critical) / CVSS v3.1
Updated	2026-09-20
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is low; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	ConnectWise ScreenConnect
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-269 (Improper Privilege Management)
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-09-11.
Exploitation prediction (EPSS)	0.92% probability of exploitation in the next 30 days (59% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline	2026-09-14 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
ConnectWise	ScreenConnect

Vendor

Product

Affected Versions

Patch Status

ConnectWise

ScreenConnect

Subsystems	OT Secure Remote Access/PAM
Sectors	Multi-sector

What to Know

ConnectWise ScreenConnect contains both an improper privilege management and missing authorization vulnerability that may allow an attacker to file transfer and execution through an active remote sessions without authorization or host confirmation.

What to Do

Monitor ConnectWise's web page for any future patch releases. See vendor advisory link below.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-84869
CVE	https://www.cve.org/CVERecord?id=CVE-2026-84869
Vendor advisory	https://www.connectwise.com/company/trust/advisories

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-84869

CVE

https://www.cve.org/CVERecord?id=CVE-2026-84869

Vendor advisory

https://www.connectwise.com/company/trust/advisories

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-09-11
Required Action Due Date	2026-09-14
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.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-09-11

Required Action Due Date

2026-09-14

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.