CVE-2026-21272
📋 TL;DR
Adobe Dreamweaver versions 21.6 and earlier contain an improper input validation vulnerability that allows arbitrary file system writes when a user opens a malicious file. This could enable attackers to manipulate or inject malicious content into system files. The vulnerability requires user interaction through opening a malicious file.
💻 Affected Systems
- Adobe Dreamweaver Desktop
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through arbitrary file writes leading to remote code execution, data destruction, or persistent malware installation.
Likely Case
Local file manipulation or corruption, potentially leading to data loss or limited system impact within user context.
If Mitigated
Limited impact with proper user awareness training and restricted file opening permissions.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code known 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' section. 3. Find Dreamweaver and click 'Update'. 4. Restart Dreamweaver after update completes.
🔧 Temporary Workarounds
Restrict file opening
allConfigure system policies to prevent opening untrusted files in Dreamweaver
Use application sandboxing
allRun Dreamweaver in sandboxed/isolated environment to limit file system access
🧯 If You Can't Patch
- Implement strict user policies prohibiting opening untrusted files in Dreamweaver
- Deploy endpoint protection with behavioral analysis to detect malicious file manipulation attempts
🔍 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: wmic product where "name like 'Adobe Dreamweaver%'" get version
On macOS: /Applications/Adobe\ Dreamweaver\ */Adobe\ Dreamweaver.app/Contents/Info.plist | grep -A1 CFBundleShortVersionStringVerify Fix Applied:
Verify Dreamweaver version is 21.7 or later in Help > About Dreamweaver.📡 Detection & Monitoring
Log Indicators:
- Unusual file write operations from Dreamweaver process
- Multiple failed file access attempts
- Dreamweaver process spawning unexpected child processes
Network Indicators:
- Unexpected outbound connections from Dreamweaver process
SIEM Query:
process_name:"Dreamweaver.exe" AND (event_type:"file_create" OR event_type:"file_modify") AND NOT file_path:"*\AppData\Local\Temp\*"