CVE-2026-3564

critical

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.

https://www.helpnetsecurity.com/2026/03/20/connectwise-screenconnect-cve-2026-3564/

https://www.securityweek.com/critical-screenconnect-vulnerability-exposes-machine-keys/

https://www.bleepingcomputer.com/news/security/connectwise-patches-new-flaw-allowing-screenconnect-hijacking/

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

Details

Source: Mitre, NVD

Published: 2026-03-17

Updated: 2026-07-09

Risk Information

CVSS v2

Base Score: 7.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 9

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

Severity: Critical

EPSS

EPSS: 0.00046

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability Being Monitored

Detections

Analytics