CVE-2025-3935

ConnectWise ScreenConnect Improper Authentication Vulnerability

ConnectWise — ScreenConnect

Added to KEV catalog: 2 June 2025
Federal remediation due date: 23 June 2025
Weakness classification (CWE): CWE-287

CISA Description

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.

Required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notes

https://www.connectwise.com/company/trust/security-bulletins/screenconnect-security-patch-2025.4 ; https://nvd.nist.gov/vuln/detail/CVE-2025-3935

View on NVD View on MITRE CVE View full CISA catalog

More ConnectWise Vulnerabilities

CVE-2024-1708

ConnectWise ScreenConnect Path Traversal Vulnerability

CVE-2024-1709

ConnectWise ScreenConnect Authentication Bypass Vulnerability

Confirm Your Exposure

Is this vulnerability present in your environment?

CRS delivers independent VAPT assessments that identify exactly which known-exploited vulnerabilities exist in your network, applications, and infrastructure.

Explore VAPT Services