CVE-2026-3564: critical vulnerability in ConnectWise ScreenConnect
ScreenConnect Instance Level Cryptographic Material Exposure
Published · Updated
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50Vexday Risk Score
Prioritize patching. It exploitation observed by VulnCheck.
ssvc Actcvss 9epss 0.4%
from disclosure to weapon
Published on NVDMar 17
VulnCheckMar 17
A condition in the ScreenConnect server component may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios. ScreenConnect host and guest client agents are not independently affected by this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/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-2025-14265CRITICALImproper server-side validation in ScreenConnect extension frameworkEPSS 0.4%