CVE-2025-61816 is a heap-based buffer overflow vulnerability (CWE-122) found in Adobe InCopy versions 20.5, 19.5.5, and earlier. This vulnerability arises from improper handling of memory buffers when processing certain file inputs, allowing an attacker to overwrite heap memory. Successful exploitation enables arbitrary code execution within the context of the current user, potentially leading to full compromise of the affected system's user environment. The attack vector requires user interaction, specifically the opening of a maliciously crafted InCopy file, which triggers the overflow. The vulnerability does not require any prior authentication, making it accessible to remote attackers who can convince users to open malicious files. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability, with low attack complexity but requiring user interaction. No known exploits have been reported in the wild, and no official patches have been released at the time of publication. Adobe InCopy is widely used in publishing and creative industries, making this vulnerability a significant risk for organizations relying on this software for content creation and editing workflows.

The exploitation of CVE-2025-61816 can lead to arbitrary code execution, allowing attackers to execute malicious payloads with the same privileges as the current user. This can result in data theft, unauthorized system modifications, installation of persistent malware, or disruption of normal operations. Since Adobe InCopy is commonly used in media, publishing, and creative sectors, successful exploitation could compromise sensitive intellectual property and disrupt critical content production workflows. The requirement for user interaction limits mass exploitation but targeted attacks against high-value individuals or organizations remain a significant threat. The vulnerability affects confidentiality by exposing sensitive data, integrity by allowing unauthorized code execution and modification, and availability by potentially crashing or destabilizing the application or host system. The absence of patches increases the window of exposure, and organizations without strict file handling policies are at higher risk.

Until Adobe releases an official patch, organizations should implement the following mitigations: 1) Educate users to avoid opening files from untrusted or unknown sources, especially unsolicited attachments or downloads. 2) Employ email and endpoint security solutions that scan and block malicious file attachments targeting Adobe InCopy. 3) Restrict file sharing and downloads to trusted repositories and enforce strict access controls. 4) Use application whitelisting and sandboxing techniques to limit the impact of potential exploitation. 5) Monitor systems for unusual behavior or crashes related to Adobe InCopy processes. 6) Maintain up-to-date backups of critical data to enable recovery in case of compromise. 7) Prepare for rapid deployment of patches once Adobe releases updates addressing this vulnerability. 8) Consider network segmentation to isolate systems running InCopy from broader enterprise networks to limit lateral movement.