CVE-2025-61818 is a Use After Free (CWE-416) vulnerability affecting Adobe InCopy versions 20.5, 19.5.5, and earlier. Use After Free vulnerabilities occur when a program continues to use memory after it has been freed, potentially allowing attackers to manipulate program execution flow. In this case, the vulnerability can be triggered by opening a maliciously crafted InCopy file, leading to arbitrary code execution within the context of the current user. The vulnerability requires user interaction (opening the file) but does not require any authentication, making it accessible to attackers who can deliver malicious files via email, shared drives, or other file transfer methods. The CVSS 3.1 base score of 7.8 reflects high severity, with the vector indicating local attack vector (AV:L), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), unchanged scope (S:U), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). No patches or exploit code are currently publicly available, but the vulnerability poses a significant risk due to the potential for arbitrary code execution. Adobe InCopy is widely used in publishing and media production environments, making this vulnerability particularly relevant to organizations in these sectors. The vulnerability's exploitation could lead to data theft, system compromise, or disruption of publishing workflows.

The potential impact of CVE-2025-61818 is substantial for organizations using Adobe InCopy. Successful exploitation allows attackers to execute arbitrary code with the same privileges as the user, potentially leading to full system compromise if the user has elevated rights. This can result in unauthorized access to sensitive documents, intellectual property theft, disruption of publishing operations, and the introduction of malware or ransomware. Since Adobe InCopy is commonly used in media, publishing, and creative industries, the confidentiality and integrity of critical content and workflows are at risk. The requirement for user interaction limits remote exploitation but does not eliminate risk, as attackers can employ social engineering or phishing to deliver malicious files. The vulnerability affects all organizations globally that rely on affected versions of Adobe InCopy, with increased risk in sectors where document sharing is frequent and security awareness may vary.

1. Monitor Adobe’s official channels for patches addressing CVE-2025-61818 and apply updates promptly once available. 2. Until patches are released, restrict the opening of InCopy files from untrusted or unknown sources. 3. Implement strict email filtering and attachment scanning to reduce the risk of malicious file delivery. 4. Educate users about the risks of opening files from unverified sources and encourage verification of file origins. 5. Employ application whitelisting and sandboxing techniques to limit the impact of potential exploitation. 6. Use endpoint detection and response (EDR) solutions to monitor for unusual behaviors related to InCopy processes. 7. Regularly back up critical data and ensure backups are isolated from the main network to mitigate ransomware risks. 8. Review and enforce least privilege principles to minimize the impact of code execution under user context. 9. Consider disabling or limiting the use of Adobe InCopy in environments where it is not essential until the vulnerability is resolved.