ConnectWise ScreenConnect
YES - ON THE CISA KEV LIST
CVE-2025-3935
ConnectWise ScreenConnect Improper Authentication Vulnerability
overdue since 2025-06-23
ConnectWise: 4 entries (0.2% of all KEV entries are from this vendor); 2 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
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 (CISA)
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
References
Other KEV entries for this vendor: ConnectWise
- CVE-2026-84869 - ScreenConnect (2026-09-11)
- CVE-2024-1708 - ScreenConnect (2026-04-28)
- CVE-2024-1709 - ScreenConnect (2024-02-22)
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