CVE-2026-84869ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions
Updated under an hour ago ()
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It affects ConnectWise ScreenConnect. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Sep 11, 2026; federal agencies had to remediate by Sep 14, 2026. Treat that date as your deadline.
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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 (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-862, CWE-269
- Known exploited
- Added to CISA KEV Sep 11, 2026; federal remediation due Sep 14, 2026Apply 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.
- EPSS (exploitation in the next 30 days)
- 0.92% (percentile 60)
- Assigned by
- ConnectWise
- NVD analysis
- Analyzed
- Record last updated
- Sep 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ConnectWise ScreenConnect connectwise:screenconnect (from the name) | All versions prior to 26.6.5 | CNA record |
connectwise screenconnect connectwise:screenconnect | before 26.6.5.9742 | NVD |
References
- https://www.connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletinvendor-advisory
- https://github.com/ConnectWise-Advisories/Disclosures/tree/main/CVE-2026-84869third-party-advisory
- https://www.connectwise.com/company/trust/advisoriesvendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-84869us-government-resource
- https://www.huntress.com/blog/rogue-screenconnect-installationsthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.