CVEs / CVE-2026-84869
CVE-2026-84869: ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability
- Known exploited in the CISA KEV catalog since 11 Sep 2026
- critical 9.9 CVSS 3.1 (from the CNA)
- EPSS 0.92% chance of exploitation in the next 30 days, higher than 60% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
ConnectWise ScreenConnect contains both an improper privilege management and missing authorization vulnerability that may allow an attacker to transfer and execute files through an active remote session without authorization or host confirmation.
Description
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| ConnectWise ScreenConnect | All versions prior to 26.6.5 | — |
Exploitation
| In CISA KEV since | 11 Sep 2026 |
|---|---|
| Due date for US federal agencies | 14 Sep 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 9.9 criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HScored by the CNA (7d616e1a-3288-43b1-a0dd-0a65d3e70a49) |
|---|---|
| Weakness | CWE-269, CWE-862 |
References
- CVE-2026-84869 on NVD
- CVE-2026-84869 in the CISA KEV catalog
- https://www.connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletin (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- https://github.com/ConnectWise-Advisories/Disclosures/tree/main/CVE-2026-84869 Third Party Advisory
- https://www.connectwise.com/company/trust/advisories Vendor Advisory
- https://www.connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletin Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-84869 US Government Resource
- https://www.huntress.com/blog/rogue-screenconnect-installations Third Party Advisory
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.