CVE-2026-84869
ConnectWise ScreenConnect
Published 8 Sept 2026 · updated 12 Sept 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 11 Sept 2026, with a remediation deadline of 14 Sept 2026 for US federal agencies.
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.
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.
References
- github.com/ConnectWise-Advisories/Disclosures/tree/main/CVE-2026-84869 · Third Party Advisory
- www.connectwise.com/company/trust/advisories · Vendor Advisory
- www.connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletin · Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-84869 · US Government Resource
- www.huntress.com/blog/rogue-screenconnect-installations · Third Party Advisory