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Vulnerability record · CVE-2025-14265 · published 11 December 2025

CVE-2025-14265: Connectwise screenconnect download of code without integrity check vulnerability

Connectwise · Screenconnect

In versions of ScreenConnect™ 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. ScreenConnect 25.8 introduces enhanced server-side configuration handling and integrity checks to ensure only trusted extensions can be installed.

9.1 CVSS 3.1 Critical EPSS 0.37% · top 71.9% CWE-494 · Download of code without integrity check
9.1CVSS 3.1 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

In versions of ScreenConnect™ 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. ScreenConnect 25.8 introduces enhanced server-side configuration handling and integrity checks to ensure only trusted extensions can be installed.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.connectwise.com/company/trust/security-bulletins/screenconnect-2025.8-security-patch Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2024-1709ConnectWise ScreenConnect authentication bypass via alternate pathConnectWise ScreenConnect 23.9.7 and earlier contain an authentication bypass (CWE-288) that lets an unauthenticated attacker reach protected functio…KEVEPSS 100%analysed9.9CVE-2026-84869ScreenConnect client allows unauthorized file transfer and execution in remote sessionsA flaw in the ConnectWise ScreenConnect client lets files be transferred and executed inside an active remote session without authorization or Host c…KEVEPSS 0.92%analysed8.4CVE-2024-1708ConnectWise ScreenConnect path traversal enabling remote code executionConnectWise ScreenConnect 23.9.7 and earlier contain a path-traversal flaw (CWE-22) that can let an attacker execute remote code or reach confidentia…KEVEPSS 95%analysed7.2CVE-2025-3935ScreenConnect ViewState code injection enables RCEScreenConnect 25.2.3 and earlier rely on ASP.NET ViewState protected by machine keys, and if those keys are compromised an attacker can craft a malic…KEVEPSS 3.5%analysed8.1CVE-2023-47257Connectwise automate code injection vulnerabilityConnectWise ScreenConnect through 23.8.4 allows man-in-the-middle attackers to achieve remote code execution via crafted messages.EPSS 1.0%5.5CVE-2023-47256Connectwise automate improper authentication vulnerabilityConnectWise ScreenConnect through 23.8.4 allows local users to connect to arbitrary relay servers via implicit trust of proxy settingsEPSS 0.45%5.3CVE-2025-14823Connectwise screenconnect vulnerabilityIn deployments using the ScreenConnect™ Certificate Signing Extension, encrypted configuration values including an Azure Key Vault-related key, could…EPSS 0.15%5.3CVE-2022-36781Connectwise screenconnect improper restriction of authentication attempts vulnerabilityConnectWise ScreenConnect versions 22.6 and below contained a flaw allowing potential brute force attacks on custom access tokens due to inadequate r…EPSS 0.62%

Source: NIST National Vulnerability Database (record CVE-2025-14265), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.