CVE-2025-14265: critical vulnerability in ConnectWise ScreenConnect
Improper server-side validation in ScreenConnect extension framework
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 0.4%
In versions of ScreenConnect™ prior to 25.8, server-side validation and integrity checks within the extension subsystem could allow the installation and execution of untrusted or arbitrary extensions by authorized or administrative users. Abuse of this behavior could result in the execution of custom code on the server or unauthorized access to application configuration data. This issue affects only the ScreenConnect server component; host and guest clients are not impacted. ScreenConnect 25.8 introduces enhanced server-side configuration handling and integrity checks to ensure only trusted extensions can be installed.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products
ConnectWise · ScreenConnectRelated CVEs — ConnectWise ScreenConnect
In the same product, most dangerous first.
CVE-2024-1709CRITICALAuthentication bypass using an alternate path or channelEPSS 100.0%KEVCVE-2024-1708HIGHImproper limitation of a pathname to a restricted directory (“path traversal”)EPSS 95.4%KEVCVE-2025-3935HIGHScreenConnect Exposure to ASP.NET ViewState Code InjectionEPSS 3.6%KEVCVE-2026-84869CRITICALScreenConnect Client: Guest-to-Host File Execution via File-Transfer ActionsEPSS 0.9%KEVCVE-2022-36781MEDIUMConnectWise - ScreenConnect Session Code BypassEPSS 0.6%CVE-2026-3564CRITICALScreenConnect Instance Level Cryptographic Material ExposureEPSS 0.4%