CVE Watch—

CVE-2025-3935

ConnectWise ScreenConnect Improper Authentication Vulnerability

CVSS

—

No CVSS

EPSS

3.5%

p89

KEV

YES

Jun 2, 2025

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

3.4%EPSS · 30 days3.5%

2026-09-162026-10-14

KEV catalog record

Product

ConnectWise / ScreenConnect

Vulnerability

ConnectWise ScreenConnect Improper Authentication Vulnerability

Added to KEV

Jun 2, 2025

Remediate by

Jun 23, 2025

Known ransomware use

Summary 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

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