CVE-2025-43593 is a high-severity out-of-bounds write vulnerability (CWE-787) affecting Adobe InDesign Desktop versions ID20.2, ID19.5.3, and earlier. This vulnerability arises when the software improperly handles memory boundaries, allowing an attacker to write data outside the intended buffer limits. Such out-of-bounds writes can corrupt memory, potentially leading to arbitrary code execution within the context of the current user. Exploitation requires user interaction, specifically the opening of a maliciously crafted InDesign file. Once triggered, the attacker could execute code with the privileges of the logged-in user, compromising confidentiality, integrity, and availability of the affected system. The CVSS 3.1 base score is 7.8, reflecting high severity due to the combination of local attack vector (AV:L), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The vulnerability impacts core Adobe InDesign Desktop functionality, a widely used professional desktop publishing application, making it a significant risk for creative industries and enterprises relying on this software for document production and publishing workflows. No known exploits are currently reported in the wild, and no patches have been linked yet, indicating a need for vigilance and proactive mitigation.

For European organizations, the impact of CVE-2025-43593 is considerable, especially for those in media, publishing, advertising, and design sectors where Adobe InDesign is extensively used. Successful exploitation could lead to unauthorized code execution, enabling attackers to steal sensitive intellectual property, manipulate documents, or deploy further malware within corporate networks. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be leveraged to deliver malicious InDesign files. The compromise could extend to data breaches, disruption of publishing workflows, and potential reputational damage. Furthermore, organizations handling regulated data under GDPR must consider the compliance implications of any data exposure resulting from exploitation. The local attack vector limits remote exploitation but does not eliminate risk, as attackers may gain initial access through other means (e.g., phishing emails) and then leverage this vulnerability to escalate privileges or move laterally within networks.

To mitigate CVE-2025-43593, European organizations should implement a multi-layered approach: 1) Educate users about the risks of opening unsolicited or unexpected InDesign files, emphasizing caution with email attachments and downloads. 2) Employ email filtering and sandboxing solutions to detect and block malicious files before reaching end users. 3) Restrict Adobe InDesign usage to trusted users and environments, applying the principle of least privilege to limit potential damage. 4) Monitor for unusual application behavior or crashes that could indicate exploitation attempts. 5) Maintain up-to-date backups of critical documents and workflows to enable recovery if compromise occurs. 6) Coordinate with Adobe for timely patch deployment once updates become available, and subscribe to official security advisories. 7) Consider application whitelisting or endpoint protection solutions capable of detecting exploitation techniques related to out-of-bounds writes. These targeted measures go beyond generic advice by focusing on user behavior, file handling policies, and proactive detection tailored to the specific threat vector.