CVE-2025-30320 is a vulnerability identified in Adobe InDesign Desktop versions ID19.5.2, ID20.2, and earlier. The issue is a NULL Pointer Dereference (CWE-476) that can be triggered when a user opens a specially crafted malicious file. This vulnerability causes the application to dereference a NULL pointer, leading to an application crash and resulting in a denial-of-service (DoS) condition. The vulnerability does not allow for code execution or data compromise but disrupts the availability of the InDesign Desktop application. Exploitation requires user interaction, specifically opening a malicious file, which limits the attack vector to targeted or socially engineered attacks. The CVSS v3.1 base score is 5.5, indicating a medium severity level. The attack vector is local (AV:L), meaning the attacker must have local access or trick the user into opening the file. No privileges are required (PR:N), but user interaction is necessary (UI:R). The impact is limited to availability (A:H) with no confidentiality or integrity impact. There are no known exploits in the wild at the time of publication, and no patches have been linked yet. The vulnerability is primarily a stability and availability concern rather than a direct threat to data confidentiality or integrity.

For European organizations, the primary impact of this vulnerability is operational disruption. Adobe InDesign is widely used in creative industries, publishing houses, marketing agencies, and media companies across Europe. A successful exploit could cause application crashes, interrupting workflows, delaying project delivery, and potentially causing financial losses due to downtime. While the vulnerability does not allow data theft or system compromise, repeated crashes or denial-of-service conditions could degrade user productivity and increase support costs. Organizations relying heavily on InDesign for critical publishing tasks may experience significant operational impact. Additionally, if attackers use this vulnerability as part of a broader social engineering campaign, it could erode user trust and increase the risk of further attacks. However, since exploitation requires user interaction and no remote code execution is possible, the risk of widespread automated attacks is limited. The absence of known exploits in the wild further reduces immediate risk but does not eliminate the need for vigilance.

European organizations should implement the following specific mitigations: 1) Educate users, especially those in creative and publishing roles, about the risks of opening files from untrusted or unknown sources to reduce the likelihood of exploitation. 2) Implement strict email and file filtering policies to detect and block potentially malicious InDesign files before they reach end users. 3) Monitor application stability and crash reports to quickly identify potential exploitation attempts or unusual activity related to InDesign. 4) Maintain an inventory of Adobe InDesign versions in use and plan for timely updates once Adobe releases patches addressing this vulnerability. 5) Use application whitelisting or sandboxing techniques where feasible to limit the impact of application crashes and isolate affected processes. 6) Coordinate with IT support to establish rapid response procedures for restoring InDesign functionality in case of crashes caused by malicious files. These measures go beyond generic advice by focusing on user awareness, proactive detection, and operational resilience tailored to the nature of this vulnerability.