CVE-2026-21323: 
Adobe After Effects vulnerability analysis and mitigation

CVE-2026-21323 is a Use After Free vulnerability in Adobe After Effects that could allow arbitrary code execution in the context of the current user. It affects Adobe After Effects versions 25.6 and earlier (specifically, all versions prior to 25.6.4). Adobe disclosed and patched this vulnerability on February 10, 2026, as part of security bulletin APSB26-15. It carries a CVSS v3.1 base score of 7.8 (High) (Adobe Advisory).

The vulnerability is classified as CWE-416 (Use After Free), meaning the application references memory after it has been freed, potentially allowing an attacker to control program execution flow. Exploitation requires a local attack vector — an attacker must convince a victim to open a specially crafted malicious file within Adobe After Effects. No authentication or elevated privileges are required on the part of the attacker, but user interaction (opening the malicious file) is a necessary precondition. No public proof-of-concept or detailed technical write-up has been identified at this time (Adobe Advisory).

Successful exploitation of this vulnerability allows an attacker to execute arbitrary code with the privileges of the currently logged-in user, resulting in high confidentiality, integrity, and availability impact on the affected system. An attacker who achieves code execution could access sensitive files, install malware, or use the compromised session as a foothold for further lateral movement within the environment. The scope is limited to the local system context of the victim user (Adobe Advisory).

1. Craft malicious file: An attacker creates a specially crafted Adobe After Effects project file designed to trigger a use-after-free condition in a vulnerable version of After Effects (25.6 or earlier).
2. Deliver the file: The attacker delivers the malicious file to the target via phishing email, file-sharing platform, or other social engineering methods, disguising it as a legitimate After Effects project.
3. Victim opens the file: The victim opens the malicious file in Adobe After Effects on a system running a vulnerable version (prior to 25.6.4).
4. Trigger use-after-free: Opening the file triggers the use-after-free vulnerability, causing After Effects to reference previously freed memory, which the attacker has manipulated to contain a malicious payload.
5. Achieve code execution: The payload executes arbitrary code in the context of the current user, potentially enabling installation of malware, data exfiltration, or further system compromise (Adobe Advisory).

• File System: Unexpected or newly created files in After Effects project directories or temp folders; presence of unknown executables or scripts dropped after opening an After Effects file.
• Process: Unusual child processes spawned by the After Effects process (e.g., cmd.exe, powershell.exe, curl, or other network utilities) shortly after opening a project file.
• Network: Unexpected outbound network connections originating from the After Effects process to unknown external IP addresses or domains.
• Logs: Application crash logs or error reports from After Effects referencing memory access violations around the time a suspicious file was opened.

Adobe has released After Effects version 25.6.4 to address this vulnerability; users should update immediately via the Creative Cloud desktop application or Adobe's update mechanism. As a workaround, users should avoid opening After Effects project files received from untrusted or unknown sources. Organizations may also consider restricting access to After Effects installations and applying application allowlisting to limit exposure (Adobe Advisory, CIS 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, recommending prompt patching (CIS Advisory). Tenable published detection plugins for this vulnerability shortly after disclosure (Tenable). No significant independent researcher commentary or notable social media discussion has been identified beyond standard vulnerability tracking and advisory coverage.