CVE-2026-3564— ScreenConnect Instance Level Cryptographic Material Exposure
Possible ATT&CK Techniques 3AI
T1068 · Exploitation for Privilege Escalation T1078 · Valid Accounts T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Vendor Advisories for CVE-2026-3564 (1)
IV. Related Vulnerabilities
Same product: ScreenConnect
- CVE-2026-11596
ConnectWise ScreenConnect 安全漏洞 - CVE-2025-14823
Certificate Signing Extension Returns Encrypted Values - CVE-2025-14265
Improper server-side validation in ScreenConnect extension f - CVE-2025-3935
ScreenConnect Exposure to ASP.NET ViewState Code Injection - CVE-2024-1709
Authentication bypass using an alternate path or channel
Same weakness: CWE-347
- CVE-2026-18500
@fastify/jwt vulnerable to authorization bypass via global s - CVE-2026-74244
Quay: stripe webhook accepts forged events without signature - CVE-2026-19910
PAX Technology Q80 Application Installer Signature Verificat - CVE-2026-47192
kas's late signature validation may allow unnoticed reposito - CVE-2026-47191
kas checks out SHA-like git branches as valid commits
V. Comments for CVE-2026-3564
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