CVE-2025-14823
📋 TL;DR
This vulnerability in ScreenConnect's Certificate Signing Extension could expose encrypted Azure Key Vault configuration values to unauthenticated users through client-facing endpoints. While the values remain encrypted, their exposure could aid attackers in understanding system configuration. Organizations using ScreenConnect with this extension are affected.
💻 Affected Systems
- ScreenConnect Certificate Signing Extension
📦 What is this software?
Screenconnect by Connectwise
⚠️ Risk & Real-World Impact
Worst Case
Attackers obtain encrypted Azure Key Vault configuration data, potentially enabling further attacks if encryption is broken or combined with other vulnerabilities.
Likely Case
Information disclosure that reveals system architecture details, helping attackers plan targeted attacks against the Azure Key Vault integration.
If Mitigated
Minimal impact as encrypted data alone without decryption keys provides limited utility to attackers.
🎯 Exploit Status
Exploitation requires accessing specific client-facing endpoints under certain conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.12 or higher
Vendor Advisory: https://www.connectwise.com/company/trust/security-bulletins/2025-12-18-screenconnect-certificate-signing-extension-update
Restart Required: Yes
Instructions:
1. Download Certificate Signing Extension version 1.0.12 or higher from ConnectWise. 2. Install the updated extension in ScreenConnect. 3. Restart ScreenConnect services.
🔧 Temporary Workarounds
Disable Certificate Signing Extension
allTemporarily disable the vulnerable extension until patching is possible.
Navigate to ScreenConnect Admin > Extensions > Certificate Signing Extension > Disable
Restrict Client-Facing Endpoint Access
allImplement network controls to limit access to vulnerable endpoints.
Configure firewall rules to restrict access to ScreenConnect client endpoints from untrusted networks
🧯 If You Can't Patch
- Implement strict network segmentation to isolate ScreenConnect servers from untrusted networks
- Monitor for unusual access patterns to client-facing endpoints and review logs regularly
🔍 How to Verify
Check if Vulnerable:
Check Certificate Signing Extension version in ScreenConnect Admin > Extensions. If version is below 1.0.12, system is vulnerable.Check Version:
Check via ScreenConnect web interface: Admin > Extensions > Certificate Signing ExtensionVerify Fix Applied:
Confirm extension version is 1.0.12 or higher in ScreenConnect Admin > Extensions.📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to client-facing endpoints
- Requests returning encrypted configuration data in responses
Network Indicators:
- Unusual traffic to ScreenConnect client endpoints from unauthorized sources
SIEM Query:
source="screenconnect" AND (uri="*client-endpoint*" OR response_contains="encrypted")