Auth bypass in Connectwise Screenconnect
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.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (60.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Connectwise Screenconnect — versions All versions prior to 26.6.5
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
References
- 7d616e1a-3288-43b1-a0dd-0a65d3e70a49 (Vendor Advisory)
- 7d616e1a-3288-43b1-a0dd-0a65d3e70a49 (Third Party Advisory)
- 7d616e1a-3288-43b1-a0dd-0a65d3e70a49 (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-84869?
- CVE-2026-84869 is a critical-severity vulnerability in Connectwise Screenconnect, classified under Improper Privilege Management. CVSS score: 9.9/10. Published 2026-09-08.
- How severe is CVE-2026-84869?
- Critical severity. CVSS v3 base score is 9.9 out of 10.
- Is CVE-2026-84869 known to be exploited?
- Yes. CVE-2026-84869 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-09-11), indicating it is being actively exploited.