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CVE-2025-14265

ConnectWise Screenconnect vulnerability

9.1 CRITICALEPSS 0.37%
  1. Published11 Dec 2025

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 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

ConnectWise Screenconnect< 25.8.0.9438

Remediation

Fixed in
ConnectWise Screenconnect≥ 25.8.0.9438

References

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Frequently asked

Is CVE-2025-14265 being actively exploited?

CVE-2025-14265 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.37%.

How severe is CVE-2025-14265?

CVE-2025-14265 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.37% probability of exploitation.

Which products are affected by CVE-2025-14265?

Affected products include ConnectWise Screenconnect.

How do I fix CVE-2025-14265?

Upgrade affected software to a fixed version, for example ConnectWise Screenconnect 25.8.0.9438 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-14265 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.