ACTIVELY EXPLOITED
CVE-2025-3935: ConnectWise ScreenConnect Improper Authentication Vulnerability
| Vendor | ConnectWise |
|---|---|
| Product | ScreenConnect |
| Actively exploited | Yes |
| Added to CISA KEV | 2 Jun 2025 |
| CISA federal deadline | 23 Jun 2025 |
| Weakness (CWE) | CWE-287 |
Required action (CISA's text)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description (NVD)
ConnectWise ScreenConnect contains an improper authentication vulnerability. This vulnerability could allow a ViewState code injection attack, which could allow remote code execution if machine keys are compromised.
SOURCES
Other ConnectWise flaws
- CVE-2026-84869: ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability
- CVE-2024-1708: ConnectWise ScreenConnect Path Traversal Vulnerability
- CVE-2024-1709: ConnectWise ScreenConnect Authentication Bypass Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.