CVE-2025-43589 is a Use After Free (CWE-416) vulnerability found in Adobe InDesign Desktop versions ID20.2, ID19.5.3, and earlier. Use After Free vulnerabilities occur when a program continues to use memory after it has been freed, leading to undefined behavior that attackers can exploit to execute arbitrary code. In this case, the vulnerability allows an attacker to craft a malicious InDesign file that, when opened by a user, triggers the use-after-free condition. This can result in arbitrary code execution within the context of the current user, potentially allowing the attacker to compromise the system. The vulnerability requires user interaction—specifically, the victim must open the malicious file—and does not require elevated privileges or prior authentication. The CVSS 3.1 base score of 7.8 reflects 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). No public exploits are known at this time, but the vulnerability poses a significant risk due to the widespread use of Adobe InDesign in creative and publishing industries.

The exploitation of this vulnerability can lead to arbitrary code execution, enabling attackers to take control of affected systems with the same privileges as the current user. This can result in data theft, system compromise, installation of malware, or disruption of services. Since Adobe InDesign is widely used in creative, publishing, and marketing sectors, organizations in these industries face risks of intellectual property theft and operational disruption. The requirement for user interaction limits the attack vector to targeted phishing or social engineering campaigns distributing malicious InDesign files. However, once exploited, the impact on confidentiality, integrity, and availability is severe. Organizations that rely heavily on Adobe InDesign for document creation and publishing are particularly vulnerable, especially if users have elevated privileges or if the compromised system is part of a larger network.

Organizations should immediately inventory their Adobe InDesign Desktop installations to identify affected versions (ID20.2, ID19.5.3, and earlier). Although no patches are currently linked, monitoring Adobe’s official security advisories for updates or patches is critical. Until a patch is available, implement strict email and file filtering to block or quarantine suspicious InDesign files, especially from untrusted sources. Educate users on the risks of opening files from unknown or unexpected sources and encourage verification before opening. Employ endpoint protection solutions capable of detecting anomalous behaviors related to memory corruption exploits. Consider running Adobe InDesign in a sandboxed or isolated environment to limit potential damage. Regularly back up critical data and maintain incident response plans to quickly address any compromise. Network segmentation can also help contain potential breaches resulting from exploitation.