CVE-2026-3564
CriticalCVSS 9.0Exploitation Probability (EPSS)
Low risk28th percentile - higher than 28% of all known CVEs
Summary
A vulnerability in the ScreenConnect server component allows 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.
Risk Assessment
The organization is at risk of privilege escalation and unauthorized access to the ScreenConnect server, potentially leading to control over remote sessions and data confidentiality breaches.
Recommendation
Immediately apply the security update provided by ScreenConnect vendor and restrict access to server cryptographic material to trusted administrators only.
Other vulnerabilities in ScreenConnect
See all- CVE-2025-14265Critical
In ScreenConnect versions 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.
- CVE-2025-3935HighActively exploited
ScreenConnect versions 25.2.3 and earlier may be susceptible to a ViewState code injection attack. To obtain the necessary machine keys, privileged system level access must be obtained.
- CVE-2026-11596Medium
In ScreenConnect™ versions prior to 26.2, input validation within the Host Pass creation functionality could allow an authenticated user with Host Pass creation privileges to specify a token expiration duration beyond the intended maximum when generating delegated access tokens.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS