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CVE-2025-14265

⛔ critical
🔍 Scan for this CVE
Summary

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 i

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 Score
9.1
Critical
EPSS Score
0.1
Exploit Probability
Published Date
2025-12-11
First Seen: 2026-01-05
📊 Relative Risk Intelligence

This CVE is High Risk - more severe than 87.6% of all 360,673 vulnerabilities in our database.

#44,742
Top 25% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: Dec 11, 2025
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
YES
Can be exploited automatically
💥 Technical Impact
Partial
Limited system impact
🏆 Discovered By
Paul Whiting (Ultraviolet Cyber)
SSVC data provided by CISA
Last Modified 2026-01-16
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE IDs (Weakness Types)
CWE-494

📦 Affected Products 1

Vendor Product Status Affected Versions
connectwise screenconnect Affected
< 25.8.0.9438

🔗 References 1

https://www.connectwise.com/company/trust/security-b...
Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-84869 ⛔ critical 9.9 0.7 A condition in the ScreenConnect client may allow files to be transferred and executed through an active remote session ... 2026-09-08
CVE-2026-11596 🔶 medium 4.7 0.2 In ScreenConnect™ versions prior to 26.2, input validation within the Host Pass creation functionality could allow an ... 2026-06-10
CVE-2025-14823 🔶 medium 5.3 0.0 In deployments using the ScreenConnect™ Certificate Signing Extension, encrypted configuration values including an Azu... 2025-12-18
CVE-2025-3935 ⚠️ high 8.1 12.3 ScreenConnect versions 25.2.3 and earlier versions may be susceptible to a ViewState code injection attack. ASP.NET Web ... 2025-04-25
CVE-2024-1708 ⚠️ high 8.4 53.7 ConnectWise ScreenConnect 23.9.7 and prior are affected by path-traversal vulnerability, which may allow an attacker t... 2024-02-21
CVE-2024-1709 ⛔ critical 10.0 94.3 ConnectWise ScreenConnect 23.9.7 and prior are affected by an Authentication Bypass Using an Alternate Path or Channel ... 2024-02-21
These CVEs affect the same products