CVE-2025-43590 is an out-of-bounds write vulnerability classified under CWE-787 affecting Adobe InDesign Desktop versions ID20.2, ID19.5.3, 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 in the context of the current user. Exploitation requires the victim to open a specially crafted malicious InDesign file, which triggers the vulnerability. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability, with low attack complexity and no privileges required but user interaction necessary. The vulnerability is significant because Adobe InDesign is widely used in creative industries for desktop publishing, making it a valuable target for attackers aiming to compromise design workstations. Currently, there are no patches or known exploits in the wild, but the vulnerability is publicly disclosed and should be addressed promptly to prevent potential exploitation.

If exploited, this vulnerability could allow attackers to execute arbitrary code with the same privileges as the logged-in user, potentially leading to full system compromise. This could result in unauthorized access to sensitive design files, intellectual property theft, disruption of publishing workflows, and deployment of malware or ransomware. The impact extends to confidentiality, as attackers could access or exfiltrate sensitive data; integrity, by modifying or corrupting files; and availability, by causing application or system crashes. Organizations relying on Adobe InDesign for critical creative processes, especially in media, advertising, and publishing sectors, face operational and reputational risks. The requirement for user interaction limits automated exploitation but does not eliminate risk, particularly in environments where users frequently receive files from external or untrusted sources.

1. Monitor Adobe’s official channels for security updates and apply patches immediately once available. 2. Until patches are released, implement strict file handling policies: restrict opening InDesign files from untrusted or unknown sources. 3. Employ endpoint protection solutions capable of detecting anomalous behavior related to memory corruption or code execution. 4. Educate users on the risks of opening unsolicited or suspicious files, emphasizing caution with email attachments and downloads. 5. Use application whitelisting and sandboxing technologies to limit the impact of potential exploitation. 6. Regularly back up critical design files and maintain offline copies to ensure recovery in case of compromise. 7. Consider network segmentation to isolate workstations running InDesign from sensitive or critical infrastructure to reduce lateral movement risk.