CVE detail
CVE-2025-3935: ConnectWise ScreenConnect Improper Authentication Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
ConnectWise · ScreenConnect
- Date added (KEV)
- Jun 02, 2025
- CISA due date
- Jun 23, 2025
- Ransomware campaign use
- Unknown
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.
Vendor fix: Vendor advisory
Scorifya interpretation
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Plain English
Technical detail
From CISA
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.
https://www.connectwise.com/company/trust/security-bulletins/screenconnect-security-patch-2025.4 ; https://nvd.nist.gov/vuln/detail/CVE-2025-3935
References
Other recent CVEs from ConnectWise
- CVE-2024-1708ScreenConnect — ConnectWise ScreenConnect Path Traversal Vulnerability
- CVE-2024-1709ScreenConnect — ConnectWise ScreenConnect Authentication Bypass Vulnerability
Check your domain's public posture
Scorifya doesn't test for specific CVEs, but if patching ConnectWise changed your headers or TLS, a fresh hardening scan helps confirm nothing regressed externally.