ConnectWise ScreenConnect Vulnerability: Early Warning and Mitigation
- Severity
- HIGH
- Affected component
- connectwise screenconnect (npm)
- Patched version
- Not yet available
An early warning has been issued for a high-severity vulnerability in ConnectWise ScreenConnect. This vulnerability may allow unauthorized file transfer and execution through active remote sessions.
What happened
An early warning has been issued regarding a vulnerability in ConnectWise ScreenConnect identified as CVE-2026-84869. This vulnerability reportedly involves improper privilege management and missing authorization, which may allow an attacker to perform unauthorized file transfers and execute commands through an active remote session. The exploit is currently under investigation and is believed to be actively exploited in the wild. Users of ConnectWise ScreenConnect are advised to take immediate action to mitigate potential risks.
The vulnerability was first flagged on September 11, 2026, and has since been added to CISA's Known Exploited Vulnerabilities (KEV) catalog. The specific version range affected by this vulnerability has not been officially published. Therefore, it is recommended that all users of ConnectWise ScreenConnect upgrade to the latest version available and review their active remote sessions for any signs of unauthorized activity.
What to do about it
- Upgrade to the latest version of ConnectWise ScreenConnect immediately.
- Review all active remote sessions for any unauthorized activity.
- No official fix has been published yet. Monitor the primary sources below for updates:
- CISA Adds 5 Actively Exploited Artifactory, ScreenConnect, and RouterOS Flaws to KEV (https://thehackernews.com/2026/09/cisa-adds-5-actively-exploited.html)
- [CISA KEV] CVE-2026-84869, ConnectWise ScreenConnect (https://www.cisa.gov/known-exploited-vulnerabilities-catalog#CVE-2026-84869)
How 0Day would have caught this
connectwise screenconnect is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.
Frequently asked questions
Am I affected?
If you are using ConnectWise ScreenConnect, you may be affected. The specific version range has not been officially published, so it is recommended to upgrade to the latest version.
What should I do right now?
Upgrade to the latest version of ConnectWise ScreenConnect and review your active remote sessions for any unauthorized activity.
Has this been exploited in the wild?
Yes, this vulnerability is reportedly being exploited in the wild.