CVE-2026-21274
📋 TL;DR
An incorrect authorization vulnerability in Adobe Dreamweaver Desktop allows attackers to execute arbitrary code with the current user's privileges. Users must open a malicious file, enabling attackers to bypass security controls. This affects Dreamweaver Desktop versions 21.6 and earlier.
💻 Affected Systems
- Adobe Dreamweaver Desktop
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through arbitrary code execution, leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation or malware installation when users open specially crafted malicious files from untrusted sources.
If Mitigated
Limited impact with proper file validation and user awareness preventing malicious file execution.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 21.7 or later
Vendor Advisory: https://helpx.adobe.com/security/products/dreamweaver/apsb26-01.html
Restart Required: Yes
Instructions:
1. Open Adobe Creative Cloud application. 2. Navigate to 'Apps' tab. 3. Find Dreamweaver and click 'Update'. 4. Restart Dreamweaver after update completes.
🔧 Temporary Workarounds
Restrict file opening
allConfigure system policies to prevent opening untrusted Dreamweaver files
Application control
windowsUse application whitelisting to restrict Dreamweaver execution to trusted locations
🧯 If You Can't Patch
- Discontinue use of Dreamweaver for opening untrusted files
- Implement network segmentation to isolate Dreamweaver systems
🔍 How to Verify
Check if Vulnerable:
Check Dreamweaver version in Help > About Dreamweaver. If version is 21.6 or earlier, system is vulnerable.Check Version:
On Windows: Check registry at HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\Dreamweaver\Version. On macOS: Check /Applications/Adobe Dreamweaver/Contents/Info.plistVerify Fix Applied:
Verify version is 21.7 or later in Help > About Dreamweaver after update.📡 Detection & Monitoring
Log Indicators:
- Unexpected Dreamweaver process spawning child processes
- Dreamweaver accessing unusual system resources
Network Indicators:
- Dreamweaver making unexpected outbound connections
SIEM Query:
process_name="dreamweaver.exe" AND (child_process_created OR network_connection_initiated)