CVE-2025-3935 · netVigilance record NV25-0117
ConnectWise ScreenConnect Improper Authentication
past due
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA deadline 2025-06-23 · passed 1 year 2 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
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.
Who is affected
ConnectWise ScreenConnect. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-287.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 1 year 2 months ago
Sources
- NVD entry for CVE-2025-3935 nvd.nist.gov/vuln/detail/CVE-2025-3935
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- connectwise.com www.connectwise.com/company/trust/security-bulletins/screenconnect-security-patch-2025.4
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2025-3935