Overview
CVE-2025-43558 is a critical vulnerability that primarily targets InDesign Desktop versions ID20.2, ID19.5.3, and earlier. It comprises an out-of-bounds write vulnerability, potentially resulting in arbitrary code execution within the user’s context. This exploit poses a significant threat to users as it could lead to system compromise or data leakage, turning a seemingly innocuous file into a dangerous weapon. Given its potential impact and severity, understanding and mitigating this vulnerability should be a priority for all users of the affected InDesign versions.
Vulnerability Summary
CVE ID: CVE-2025-43558
Severity: High (7.8 CVSS Score)
Attack Vector: Local
Privileges Required: None
User Interaction: Required
Impact: Arbitrary code execution, potential system compromise, and data leakage
Affected Products
Share secrets securely
Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.
Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.
- • Encrypted identity
- • Private Spaces for organizations and teams
- • End-to-end encrypted chat, calls, files, and notes
- • Sensitive AI work and protected collaboration
- • Built for information that cannot leak
Our mission is to secure human work alongside AI.
Product | Affected Versions
InDesign Desktop | ID20.2
InDesign Desktop | ID19.5.3 and earlier versions
How the Exploit Works
The vulnerability CVE-2025-43558 occurs due to insufficient boundary checks when handling certain file inputs in Adobe InDesign. This oversight allows an attacker to write data past the allocated memory buffer (an “out-of-bounds” write), which can lead to a memory corruption. If a user opens a maliciously crafted file, the attacker can exploit this corruption to execute arbitrary code within the context of the current user.
Conceptual Example Code
While a specific exploit code for this vulnerability is not available, the below pseudocode illustrates the conceptual working of an out-of-bounds write vulnerability:
// Pseudocode illustrating the concept of an out-of-bounds write
char buffer[10];
// Assume that the attacker can control the value of 'index' and 'value'
int index = getUserInput();
char value = getUserInput();
// If 'index' is greater than 9, this write is out-of-bounds
buffer[index] = value;In this pseudocode, if the attacker provides an ‘index’ value greater than 9, the write will occur out-of-bounds, leading to memory corruption.
Mitigation Guidance
Users are advised to apply the vendor-released patch to fix this vulnerability. If the patch is not immediately available, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. Regularly updating software, avoiding untrusted files, and using reliable security solutions can also help prevent the exploitation of such vulnerabilities.