ConnectWise released a security update for ScreenConnect to address a critical vulnerability, tracked as CVE-2025-14265, which affects the server component of the remote access platform. The flaw, caused by improper code integrity validation during extension installations (CWE-494), could allow attackers with authorized or administrative access to expose sensitive configuration data and install untrusted extensions. The vulnerability carries a CVSS 3.1 base score of 9.1, highlighting its severity, though ConnectWise reports no evidence of active exploitation at this time. The issue impacts all ScreenConnect versions prior to 25.8, and the 25.8 patch enforces stricter server-side validation and integrity checks for extension installations.
ConnectWise has automatically applied updates to cloud-hosted ScreenConnect instances, while on-premises users must manually upgrade to version 25.8. Partners using Automate integration are advised to update their Automate ScreenConnect Extension before upgrading ScreenConnect itself. Security advisories from both ConnectWise and the Canadian Centre for Cyber Security urge organizations to prioritize patching to prevent potential unauthorized access and maintain secure remote management environments. The vulnerability is rated as Priority 2 – Moderate, with a recommended update window of 30 days, but immediate action is encouraged due to the risk of sensitive data exposure.

Mallory correlates global threat intelligence with your attack surface — know if you’re exposed before adversaries strike.
3 events from the most recent confirmed update back to the earliest known activity.
By 2025-12-16, public reporting described CVE-2025-14265 as a critical issue with a CVSS score of 9.1, caused by improper code integrity validation during extension installation. Reports noted there was no evidence of active exploitation, but warned the bug could enable configuration exposure and untrusted extension installation.
As part of the advisory, ConnectWise issued a security update for the ScreenConnect server component to remediate the vulnerability in versions prior to 25.8. Organizations, especially those running on-premises deployments, were urged to apply the update promptly.
On 2025-12-11, ConnectWise released a security advisory for a critical ScreenConnect vulnerability, CVE-2025-14265, affecting all versions prior to 25.8. The flaw can expose sensitive configuration data and allow installation of untrusted extensions.
Vulnerabilities, threat actors, malware, products, organizations, and breaches Mallory has linked to this story.
3 references tracked. Mallory keeps watching after this page renders.
cybersecuritynews.com
Open sourcesecurityonline.info
Open sourcecyber.gc.ca
Open sourceMap indicators from this story to your assets and identify affected systems in minutes.
Every observed campaign, victim, and pivot linked to actors named in this story.
Malware, exploits, and IOCs connected to the activity described here.
YARA, Sigma, and Snort rules deployed to your SIEM as soon as they’re published.
Get matching new stories delivered to your team as they break — not the next morning.
Ask questions about this story and take action on the answers.