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
See what attackers can see on your domain
This vulnerability is on CISA's Known Exploited Vulnerabilities list, so it is being exploited in the wild right now. Scorifya can't test for ConnectWise directly, but in about 30 seconds it shows what your own domain exposes publicly across TLS, security headers, DNS, and cookies: the surface attackers probe first.
SOC 2 compliance
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Other recent CVEs from ConnectWise
- CVE-2024-1708ScreenConnect, ConnectWise ScreenConnect Path Traversal Vulnerability
- CVE-2024-1709ScreenConnect, ConnectWise ScreenConnect Authentication Bypass Vulnerability