CVE-2026-21319 is an out-of-bounds read vulnerability classified under CWE-125 affecting Adobe After Effects versions 25.6 and earlier. This vulnerability arises when the software improperly handles memory boundaries while processing certain file inputs, allowing an attacker to read memory locations beyond the intended buffer. The consequence is exposure of sensitive information stored in memory, which could include user data, credentials, or proprietary project information. Exploitation requires the victim to open a crafted malicious file, making user interaction mandatory. No privileges or authentication are required, which lowers the barrier for exploitation, but the need for user action limits the attack vector. The CVSS 3.1 base score is 5.5, with vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N indicating local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, high confidentiality impact, and no impact on integrity or availability. Currently, there are no known exploits in the wild, and no patches have been published yet. The vulnerability is significant for environments where After Effects is used to process untrusted files or where sensitive information is handled in memory during project editing or rendering.

For European organizations, this vulnerability poses a risk primarily to confidentiality. Media, advertising, and creative industries that rely heavily on Adobe After Effects for video production and post-processing could inadvertently expose sensitive project data or intellectual property if a malicious file is opened. While the vulnerability does not affect integrity or availability, the leakage of sensitive information could lead to competitive disadvantage, privacy violations, or regulatory non-compliance under GDPR if personal data is exposed. The requirement for user interaction means social engineering or phishing campaigns could be used to deliver malicious files. Organizations with remote or hybrid workforces may face increased risk due to file sharing practices. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once the vulnerability is publicly known.

Organizations should implement a multi-layered defense strategy. First, monitor Adobe’s security advisories and apply patches immediately once they become available. Until patches are released, restrict the opening of After Effects project files from untrusted or unknown sources. Employ endpoint protection solutions capable of detecting malicious file behaviors and suspicious memory access patterns. Train users to recognize phishing attempts and avoid opening unsolicited or suspicious files. Use network segmentation to limit exposure of sensitive systems and data. Additionally, consider sandboxing or running After Effects in isolated environments when handling files from external sources. Regularly audit and review file sharing policies and access controls to minimize the risk of malicious file introduction. Finally, maintain up-to-date backups to ensure recovery in case of any related incidents.