CVE-2025-54216 is an out-of-bounds write vulnerability classified under CWE-787 affecting Adobe InCopy versions 20.4, 19.5.4, and earlier. The vulnerability arises from improper bounds checking during file processing, which allows an attacker to write data outside the intended memory buffer. This memory corruption can be exploited to execute arbitrary code within the context of the current user. The attack vector requires the victim to open a maliciously crafted InCopy file, making user interaction essential for exploitation. The vulnerability has a CVSS 3.1 base score of 7.8, reflecting high severity due to its potential to compromise confidentiality, integrity, and availability. The attack complexity is low, requiring no privileges and only user interaction. Although no public exploits are known at this time, the flaw poses a significant risk to users of affected Adobe InCopy versions, particularly in environments where untrusted files may be received. Adobe has not yet released patches, so mitigation currently relies on defensive measures and user awareness.

The impact of CVE-2025-54216 is substantial for organizations relying on Adobe InCopy for content creation and publishing workflows. Successful exploitation can lead to arbitrary code execution, allowing attackers to install malware, steal sensitive information, or disrupt operations. Since the vulnerability affects confidentiality, integrity, and availability, it can facilitate data breaches, intellectual property theft, and operational downtime. The requirement for user interaction limits automated exploitation but does not eliminate risk, especially in environments where users frequently exchange files. Attackers could leverage social engineering to trick users into opening malicious files. The absence of a patch increases exposure time, elevating the risk of targeted attacks. Organizations with high-value creative assets or sensitive editorial content are particularly vulnerable, as compromise could have reputational and financial consequences.

Until Adobe releases an official patch, organizations should implement several specific mitigations: 1) Enforce strict file handling policies by restricting the opening of InCopy files from untrusted or unknown sources. 2) Employ email and endpoint security solutions with advanced file scanning and sandboxing capabilities to detect and block malicious InCopy files. 3) Educate users on the risks of opening unsolicited or suspicious files and promote cautious behavior. 4) Use application whitelisting to limit execution of unauthorized code. 5) Monitor systems for unusual behavior indicative of exploitation attempts, such as unexpected process launches or memory anomalies. 6) Maintain up-to-date backups to enable recovery in case of compromise. 7) Prepare to deploy Adobe patches promptly once available, and test updates in controlled environments before widespread rollout. These targeted actions reduce the attack surface and improve organizational resilience against this vulnerability.