CVE-2026-21322
📋 TL;DR
CVE-2026-21322 is an out-of-bounds read vulnerability in Adobe After Effects that could allow arbitrary code execution when a user opens a malicious file. This affects After Effects versions 25.6 and earlier. Attackers could exploit this to run code with the victim's user privileges.
💻 Affected Systems
- Adobe After Effects
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through arbitrary code execution with the current user's privileges, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Local privilege escalation or malware execution when a user opens a malicious After Effects project file.
If Mitigated
No impact if users don't open untrusted files or if the software is patched.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) and knowledge of file format parsing. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 25.7 or later
Vendor Advisory: https://helpx.adobe.com/security/products/after_effects/apsb26-15.html
Restart Required: Yes
Instructions:
1. Open Adobe Creative Cloud application. 2. Navigate to 'Apps' tab. 3. Find After Effects and click 'Update'. 4. Restart After Effects after update completes.
🔧 Temporary Workarounds
Restrict file opening
allConfigure system to prevent opening untrusted .aep files or restrict After Effects execution
🧯 If You Can't Patch
- Implement application whitelisting to block After Effects execution
- Educate users to never open After Effects files from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check After Effects version via Help > About After Effects. If version is 25.6 or earlier, system is vulnerable.Check Version:
On Windows: Check registry at HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\After Effects\XX.0\InstallPath. On macOS: Check /Applications/Adobe After Effects XX.X/Verify Fix Applied:
Verify After Effects version is 25.7 or later in Help > About After Effects.📡 Detection & Monitoring
Log Indicators:
- After Effects crash logs with memory access violations
- Unexpected After Effects process spawning child processes
Network Indicators:
- After Effects making unexpected network connections post-file opening
SIEM Query:
Process creation where parent_process contains 'After Effects' AND (process contains 'cmd.exe' OR process contains 'powershell.exe' OR process contains 'bash')