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CVE-2026-3564— ScreenConnect Instance Level Cryptographic Material Exposure

Quick assessment

Affected
ConnectWise ScreenConnect
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ConnectWise ScreenConnect是ConnectWise公司的一种自托管远程桌面软件应用程序。 ConnectWise ScreenConnect存在安全漏洞，该漏洞源于特定场景下，拥有服务器级身份验证加密材料的参与者可能获得未经授权的访问。

CVSS 9.0 · Critical EPSS 0.28% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
ConnectWise ScreenConnect All server versions prior to 26.1 affected
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I. Basic Information for CVE-2026-3564

Vulnerability Information
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Vulnerability Title
ScreenConnect Instance Level Cryptographic Material Exposure
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
ConnectWise ScreenConnect 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ConnectWise ScreenConnect是ConnectWise公司的一种自托管远程桌面软件应用程序。 ConnectWise ScreenConnect存在安全漏洞，该漏洞源于特定场景下，拥有服务器级身份验证加密材料的参与者可能获得未经授权的访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
ConnectWise ScreenConnect All server versions prior to 26.1 -

II. Public POCs for CVE-2026-3564

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III. Intelligence Information for CVE-2026-3564

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Vendor Advisories for CVE-2026-3564 (1)

IV. Related Vulnerabilities

Same product: ScreenConnect
Same vendor: ConnectWise
Same weakness: CWE-347

V. Comments for CVE-2026-3564

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