CVE-2025-61818
📋 TL;DR
A use-after-free vulnerability in Adobe InCopy allows arbitrary code execution when a user opens a malicious file. This affects users running vulnerable versions of InCopy on any operating system. Successful exploitation requires user interaction but gives attackers full control of the affected system.
💻 Affected Systems
- Adobe InCopy
📦 What is this software?
Incopy by Adobe
Incopy by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Malicious document delivered via phishing leads to malware installation, credential theft, or data exfiltration from the victim's workstation.
If Mitigated
With proper controls, exploitation attempts are blocked at email gateways, users are trained to avoid suspicious files, and endpoint protection detects malicious payloads.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) and knowledge of memory corruption techniques. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to InCopy 20.5.1 or 19.5.6
Vendor Advisory: https://helpx.adobe.com/security/products/incopy/apsb25-107.html
Restart Required: Yes
Instructions:
1. Open Adobe InCopy
2. Go to Help > Check for Updates
3. Follow prompts to install available updates
4. Restart InCopy after installation completes
🔧 Temporary Workarounds
Disable InCopy file associations
allPrevent InCopy from automatically opening potentially malicious files
Windows: Control Panel > Default Programs > Associate a file type or protocol with a program
macOS: Right-click .incx file > Get Info > Open With > Change All
🧯 If You Can't Patch
- Implement application whitelisting to block execution of unauthorized InCopy files
- Deploy email filtering to block suspicious attachments and train users to avoid opening unexpected InCopy documents
🔍 How to Verify
Check if Vulnerable:
Check InCopy version via Help > About InCopy. If version is 20.5, 19.5.5 or earlier, system is vulnerable.Check Version:
Windows: wmic product where name="Adobe InCopy" get version
macOS: /Applications/Adobe\ InCopy\ CC/Adobe\ InCopy.app/Contents/Info.plist | grep -A1 CFBundleShortVersionStringVerify Fix Applied:
Verify InCopy version is 20.5.1 or 19.5.6 or later via Help > About InCopy.📡 Detection & Monitoring
Log Indicators:
- Unexpected InCopy crashes with memory access violations
- Process creation from InCopy with unusual command lines
- File access to suspicious locations by InCopy process
Network Indicators:
- Outbound connections from InCopy process to unknown external IPs
- DNS requests for suspicious domains following InCopy execution
SIEM Query:
process_name:"InCopy.exe" AND (event_id:1 OR event_id:4688) AND (command_line:*http* OR command_line:*powershell* OR command_line:*cmd*)