CVE-2025-21124: 
Adobe InDesign vulnerability analysis and mitigation

CVE-2025-21124 is an out-of-bounds read vulnerability affecting Adobe InDesign Desktop versions ID20.0, ID19.5.1 and earlier. The vulnerability was discovered and disclosed on February 11, 2025, and could lead to disclosure of sensitive memory. This security flaw could potentially allow an attacker to bypass security mitigations such as ASLR (Address Space Layout Randomization). The exploitation requires user interaction, specifically opening a malicious file (NVD).

The vulnerability is classified as an out-of-bounds read issue (CWE-125) that affects memory handling in Adobe InDesign. It has been assigned a CVSS v3.1 Base Score of 5.5 (Medium) with the following vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N. This indicates that the vulnerability requires local access and user interaction, has no privileges required, and can lead to high confidentiality impact without affecting integrity or availability (NVD).

The vulnerability can result in the disclosure of sensitive memory information, which could be leveraged by attackers to bypass security mitigations such as ASLR. This type of vulnerability primarily affects the confidentiality of the system, potentially exposing sensitive data to unauthorized access (CIS Advisory).

Adobe has released security updates to address this vulnerability. Users should update to Adobe InDesign ID20.1 or ID19.5.2, depending on their version. The update is available through Adobe's regular update channels. Organizations are advised to apply the stable channel update provided by Adobe to vulnerable systems immediately after appropriate testing (ASEC).