Vulnerability in Connectwise Screenconnect
CVE-2025-14265
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (28.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Connectwise Screenconnect — versions All versions prior to 2025.8
Weakness classification (CWE)
References
- 7d616e1a-3288-43b1-a0dd-0a65d3e70a49 (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-14265?
- CVE-2025-14265 is a critical-severity vulnerability in Connectwise Screenconnect, classified under Download of Code Without Integrity Check. CVSS score: 9.1/10. Published 2025-12-11.
- How severe is CVE-2025-14265?
- Critical severity. CVSS v3 base score is 9.1 out of 10.