CVE-2025-47134 is a heap-based buffer overflow vulnerability identified in Adobe InDesign Desktop versions 19.5.3 and earlier. This vulnerability arises from improper handling of memory allocation on the heap, which can be exploited when a user opens a specially crafted malicious file within the application. The flaw allows an attacker to overwrite adjacent memory locations, potentially leading to arbitrary code execution within the context of the current user. Exploitation requires user interaction, specifically opening a malicious InDesign file, which triggers the overflow condition. The vulnerability is classified under CWE-122, indicating a classic heap-based buffer overflow scenario. The CVSS v3.1 base score is 7.8, reflecting high severity due to its potential to compromise confidentiality, integrity, and availability. The attack vector is local (AV:L), meaning the attacker must have local access or trick the user into opening the malicious file. No privileges are required (PR:N), but user interaction (UI:R) is necessary. The vulnerability affects the confidentiality, integrity, and availability of the system (C:H/I:H/A:H). Currently, there are no known exploits in the wild, and no patches have been published yet. Given Adobe InDesign's widespread use in creative industries for desktop publishing, this vulnerability poses a significant risk, especially in environments where untrusted files may be received or shared. Attackers could leverage this flaw to execute arbitrary code, potentially leading to data theft, system compromise, or disruption of business operations.

For European organizations, the impact of CVE-2025-47134 can be substantial, particularly for those in media, publishing, advertising, and design sectors where Adobe InDesign is heavily utilized. Successful exploitation could lead to unauthorized code execution, enabling attackers to steal sensitive intellectual property, manipulate or destroy design files, or establish persistence within corporate networks. This could result in financial losses, reputational damage, and operational disruptions. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be used to deliver malicious InDesign files, increasing the risk in organizations with less stringent email and file handling policies. Additionally, given the high confidentiality and integrity impact, organizations handling sensitive client data or proprietary content are at elevated risk. The absence of a patch at the time of disclosure means organizations must rely on interim mitigations, increasing exposure duration. The threat also extends to supply chain risks, where compromised design files could propagate malware or backdoors to downstream partners or clients.

To mitigate the risk posed by CVE-2025-47134, European organizations should implement a multi-layered approach: 1) Enforce strict email and file attachment policies to block or quarantine unsolicited or suspicious InDesign files, especially from unknown sources. 2) Educate users about the risks of opening files from untrusted origins and train them to recognize phishing attempts. 3) Employ endpoint protection solutions capable of detecting anomalous behavior or exploitation attempts related to heap overflows. 4) Utilize application whitelisting to restrict execution of unauthorized code and sandboxing techniques to isolate InDesign processes where feasible. 5) Monitor network and endpoint logs for unusual activity indicative of exploitation attempts. 6) Coordinate with Adobe for timely patch deployment once available, and prioritize updating InDesign Desktop to versions beyond 19.5.3 as soon as patches are released. 7) Consider disabling or restricting the use of InDesign Desktop in high-risk environments until a patch is applied. 8) Implement Data Loss Prevention (DLP) controls to prevent exfiltration of sensitive design files or intellectual property. These targeted measures go beyond generic advice by focusing on controlling file intake, user behavior, and process isolation specific to the nature of this vulnerability.