CVE-2026-21347
📋 TL;DR
Adobe Bridge versions 15.1.3, 16.0.1 and earlier contain an integer overflow vulnerability that could allow arbitrary code execution when a user opens a malicious file. This affects users of Adobe Bridge on all supported platforms. The vulnerability requires user interaction to trigger.
💻 Affected Systems
- Adobe Bridge
📦 What is this software?
Bridge by Adobe
Bridge by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the victim's computer in the context of the current user.
Likely Case
Malicious code execution leading to data theft, ransomware deployment, or persistence mechanisms installation.
If Mitigated
Limited impact if file execution controls restrict untrusted files and user awareness prevents opening suspicious files.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code available at time of advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Bridge 16.0.2 or later
Vendor Advisory: https://helpx.adobe.com/security/products/bridge/apsb26-21.html
Restart Required: Yes
Instructions:
1. Open Adobe Creative Cloud application. 2. Navigate to 'Apps' section. 3. Find Adobe Bridge and click 'Update'. 4. Alternatively, download latest version from Adobe website. 5. Restart computer after installation.
🔧 Temporary Workarounds
Restrict file execution
allConfigure system to prevent execution of untrusted Bridge files
User awareness training
allTrain users to avoid opening untrusted Bridge files from unknown sources
🧯 If You Can't Patch
- Implement application whitelisting to block Bridge execution
- Use endpoint protection with file reputation checking for Bridge files
🔍 How to Verify
Check if Vulnerable:
Check Bridge version in Help > About Adobe Bridge. If version is 15.1.3, 16.0.1 or earlier, system is vulnerable.Check Version:
On Windows: wmic product where name="Adobe Bridge" get version
On macOS: /Applications/Adobe Bridge/Adobe Bridge.app/Contents/Info.plist | grep -A1 CFBundleShortVersionStringVerify Fix Applied:
Verify Bridge version is 16.0.2 or later in Help > About Adobe Bridge.📡 Detection & Monitoring
Log Indicators:
- Unexpected Bridge process crashes
- Suspicious file opens in Bridge logs
Network Indicators:
- Outbound connections from Bridge to unknown IPs post-file open
SIEM Query:
process_name:"bridge.exe" AND (event_type:crash OR parent_process:explorer.exe AND cmdline:*.*br* AND NOT user_interaction:false)