CVE-2026-21330: 
Adobe After Effects vulnerability analysis and mitigation

CVE-2026-21330 is a type confusion vulnerability in Adobe After Effects that allows arbitrary code execution. It affects Adobe After Effects versions prior to 25.6.4 and was disclosed on February 10, 2026, with a patch released the same day. The vulnerability carries a CVSS v3.1 base score of 7.8 (High) (Adobe Advisory).

The vulnerability is classified as CWE-843 (Access of Resource Using Incompatible Type, or 'Type Confusion'), meaning the application accesses a resource using a type incompatible with how it was originally allocated or initialized. The attack vector is local, requires no privileges, but does require user interaction — typically opening a maliciously crafted project or media file in After Effects. Exploitation is considered low complexity once a victim opens the crafted file (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary code in the context of the current user, resulting in high confidentiality, integrity, and availability impact on the affected system. An attacker could gain full control of the affected workstation, access sensitive files, install malware, or use the compromised system as a pivot point for further lateral movement within a network. The scope is limited to the affected system and does not propagate automatically (Adobe Advisory).

1. Craft malicious file: An attacker creates a specially crafted Adobe After Effects project file or media asset designed to trigger the type confusion condition in a vulnerable version of After Effects (prior to 25.6.4).
2. Deliver the file: The attacker delivers the malicious file to the target via phishing email, file-sharing platform, or social engineering, enticing the victim to open it.
3. Trigger type confusion: When the victim opens the file in a vulnerable After Effects installation, the application accesses an internal resource using an incompatible type, corrupting memory in a controlled manner.
4. Achieve code execution: The type confusion condition is leveraged to redirect program execution to attacker-controlled code, resulting in arbitrary code execution under the privileges of the current user (Adobe Advisory).

Adobe has released a patched version of After Effects (25.6.4) that addresses this vulnerability. Users should update Adobe After Effects to version 25.6.4 or later immediately via the Creative Cloud desktop application or Adobe's official update mechanism. No configuration-based workaround is available; upgrading is the only recommended remediation (Adobe Advisory).

The Center for Internet Security (CIS) issued an advisory noting that multiple vulnerabilities in Adobe products, including this one, could allow for arbitrary code execution (CIS Advisory). Tenable published detection plugins for this vulnerability shortly after disclosure. General community reaction was consistent with routine Adobe Patch Tuesday coverage, with no exceptional concern given the lack of active exploitation.