CVE-2026-3564 — CRITICAL (9.0)

Vulnerability Description

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 Score

9.0

CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-347

References

https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenco

FAQ

What is CVE-2026-3564?

CVE-2026-3564 is a vulnerability with a CVSS score of 9.0 (CRITICAL). 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 privil...

How severe is CVE-2026-3564?

CVE-2026-3564 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-3564?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.