CVE-2026-21319: Adobe After Effects Info Disclosure Flaw

CVE-2026-21319 Overview

Adobe After Effects versions 25.6 and earlier contain an Out-of-Bounds Read vulnerability (CWE-125) that could lead to memory exposure. This vulnerability allows an attacker to leverage improper memory access to read sensitive information stored outside the intended memory boundaries. Successful exploitation requires user interaction, as a victim must open a maliciously crafted file.

Critical Impact

This vulnerability enables attackers to access sensitive memory contents, potentially exposing confidential information such as credentials, encryption keys, or other protected data processed by After Effects.

Affected Products

• Adobe After Effects versions 25.6 and earlier
• Apple macOS (all supported versions running affected After Effects)
• Microsoft Windows (all supported versions running affected After Effects)

Discovery Timeline

• 2026-02-10 - CVE-2026-21319 published to NVD
• 2026-02-11 - Last updated in NVD database

Technical Details for CVE-2026-21319

Vulnerability Analysis

This Out-of-Bounds Read vulnerability occurs when After Effects improperly handles memory access during file processing operations. When a user opens a specially crafted malicious file, the application reads data beyond the allocated buffer boundaries, allowing access to adjacent memory regions that may contain sensitive information.

The vulnerability requires local access and user interaction for exploitation. An attacker must convince a victim to open a malicious After Effects project file or media asset. Once opened, the Out-of-Bounds Read operation can leak memory contents back to the attacker through various channels embedded in the malicious file structure.

Root Cause

The root cause stems from insufficient bounds checking in After Effects' file parsing routines. When processing certain file structures or metadata, the application fails to properly validate array indices or buffer lengths before performing read operations. This allows read access to memory addresses outside the intended data structure boundaries.

Attack Vector

The attack requires local file access and depends on social engineering to deliver the malicious file to the victim. Attack scenarios include:

• Distributing malicious .aep (After Effects Project) files via email attachments
• Sharing compromised project files through collaboration platforms
• Embedding malicious media assets that trigger the vulnerability when imported
• Compromising shared network locations where After Effects users access project files

The vulnerability is exploited through crafted file structures that cause the application to read beyond allocated memory buffers during parsing. Since the attacker cannot directly execute code through this vulnerability alone, it is typically chained with other vulnerabilities to achieve more impactful attacks like remote code execution.

Detection Methods for CVE-2026-21319

Indicators of Compromise

• Unusual After Effects crash patterns when opening files from untrusted sources
• Memory dump files containing unexpected data fragments from other applications
• After Effects processes accessing memory regions outside normal operational boundaries
• Suspicious .aep or media files with malformed headers or metadata structures

Detection Strategies

• Monitor After Effects processes for abnormal memory access patterns using endpoint detection tools
• Implement file integrity monitoring on After Effects project directories
• Deploy application-aware security solutions that can detect malicious file structures
• Enable crash reporting and analyze dump files for evidence of out-of-bounds memory access

Monitoring Recommendations

• Configure endpoint detection to alert on After Effects exceptions related to memory access violations
• Establish baseline behavior for After Effects file I/O operations and alert on anomalies
• Monitor network shares and collaboration platforms for distribution of suspicious After Effects project files
• Implement email gateway scanning for potentially malicious media and project file attachments

How to Mitigate CVE-2026-21319

Immediate Actions Required

• Update Adobe After Effects to the latest patched version beyond 25.6
• Restrict opening of After Effects files from untrusted or unknown sources
• Implement strict file validation policies for incoming project files
• Enable application sandboxing where available to limit memory access scope

Patch Information

Adobe has released a security update addressing this vulnerability. Refer to the Adobe After Effects Security Advisory (APSB26-15) for official patch information and download links. Organizations should prioritize applying this update through their standard patch management processes.

Workarounds

• Disable automatic preview generation for untrusted After Effects files
• Configure After Effects to run with reduced privileges where possible
• Use virtual machines or sandboxed environments when working with files from untrusted sources
• Implement application allowlisting to prevent execution of modified After Effects binaries