CVE-2025-54206 is an out-of-bounds write vulnerability (CWE-787) affecting Adobe InDesign Desktop versions 20.4, 19.5.4, and earlier. This vulnerability arises when the software improperly handles memory boundaries during file processing, allowing an attacker to write data outside the intended buffer. Such memory corruption can lead to arbitrary code execution within the context of the current user. The attack vector requires the victim to open a maliciously crafted InDesign file, which triggers the vulnerability. The CVSS v3.1 base score is 7.8, indicating high severity, with attack vector local (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). Although no public exploits are known yet, the vulnerability poses a significant risk due to the potential for full compromise of the affected system under the current user's privileges. Adobe has not yet released patches, so users must rely on mitigations until updates are available.

The vulnerability allows attackers to execute arbitrary code with the same privileges as the current user, potentially leading to full compromise of the affected system. This can result in unauthorized access to sensitive documents, data theft, installation of malware, or disruption of business operations. Since Adobe InDesign is widely used in creative industries, marketing, publishing, and media sectors, exploitation could lead to intellectual property theft and operational downtime. The requirement for user interaction (opening a malicious file) limits mass exploitation but targeted attacks, such as spear-phishing campaigns, remain a significant threat. Organizations with high reliance on Adobe InDesign for content creation and document management are at elevated risk, especially if users frequently handle files from untrusted sources.

Until Adobe releases an official patch, organizations should implement the following mitigations: 1) Educate users to avoid opening InDesign files from untrusted or unknown sources. 2) Employ email and endpoint security solutions to detect and block malicious InDesign files. 3) Use application whitelisting or sandboxing to restrict InDesign's ability to execute arbitrary code or access sensitive system resources. 4) Monitor systems for unusual behavior indicative of exploitation attempts. 5) Maintain regular backups of critical data to enable recovery in case of compromise. 6) Once patches are available, prioritize timely deployment across all affected systems. 7) Consider disabling or restricting InDesign usage on systems where it is not essential to reduce the attack surface.