CVE-2026-21351
📋 TL;DR
Adobe After Effects versions 25.6 and earlier contain a use-after-free vulnerability that could allow attackers to execute arbitrary code on a victim's system when they open a malicious file. This affects users running vulnerable versions of After Effects on any operating system. Successful exploitation requires user interaction to open a specially crafted file.
💻 Affected Systems
- Adobe After Effects
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the victim's computer, allowing data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation leading to malware installation, data exfiltration, or system disruption for the current user account.
If Mitigated
Limited impact with proper application sandboxing and user account restrictions, potentially containing damage to the After Effects process only.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code available 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' section. 3. Find After Effects and click 'Update'. 4. Install version 25.7 or later. 5. Restart computer if prompted.
🔧 Temporary Workarounds
Restrict file opening
allConfigure system to prevent opening untrusted After Effects project files
Application sandboxing
allRun After Effects in restricted environment using sandboxing tools
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of malicious payloads
- Use standard user accounts instead of administrator accounts for daily work
🔍 How to Verify
Check if Vulnerable:
Open After Effects, go to Help > About After Effects, check if version is 25.6 or earlierCheck Version:
On Windows: wmic product where name="Adobe After Effects" get version
On macOS: /Applications/Adobe\ After\ Effects\ */Adobe\ After\ Effects.app/Contents/Info.plist | grep -A1 CFBundleShortVersionStringVerify Fix Applied:
Verify After Effects version is 25.7 or later in Help > About After Effects📡 Detection & Monitoring
Log Indicators:
- Unexpected After Effects crashes
- Suspicious file opening events in application logs
- Unusual process creation from After Effects
Network Indicators:
- Outbound connections from After Effects to unknown IPs
- DNS requests for suspicious domains after file opening
SIEM Query:
process_name:"AfterFX.exe" AND (event_type:crash OR parent_process:explorer.exe AND cmdline:*.aep)