CVE-2025-43577 in Acrobat Reader
Summary
by MITRE • 06/10/2025
Acrobat Reader versions 24.001.30235, 20.005.30763, 25.001.20521 and earlier are affected by a Use After Free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
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Analysis
by VulDB Data Team • 06/12/2025
This vulnerability represents a critical use after free condition in Adobe Acrobat Reader affecting multiple version lines including 24.001.30235, 20.005.30763, and 25.001.20521 along with earlier releases. The flaw occurs when the application processes specially crafted PDF files that trigger improper memory management during object deallocation. When a PDF document contains maliciously constructed data structures, the reader may attempt to access memory that has already been freed, creating a scenario where attackers can manipulate the program flow through controlled memory corruption. This vulnerability maps to CWE-416 which specifically addresses use after free conditions in software applications. The security implications extend beyond simple memory corruption as this flaw can be leveraged to execute arbitrary code with the privileges of the currently logged-in user, making it particularly dangerous in enterprise environments where users frequently open documents from untrusted sources.
The exploitation of this vulnerability requires user interaction through social engineering or phishing attacks where victims must voluntarily open a maliciously crafted PDF file. This interaction requirement aligns with ATT&CK technique T1204.002 which describes user execution through malicious files, making it a prime candidate for targeted attacks in corporate networks. The attack surface is significant given Acrobat Reader's widespread adoption across organizations and the common practice of opening PDF documents from email attachments, web downloads, or shared network drives. Once a user opens the malicious file, the attacker can potentially gain complete control over the victim's system, including access to sensitive data, ability to install additional malware, or use the compromised system as a launch point for further attacks within the network infrastructure.
The operational impact of this vulnerability extends beyond immediate code execution capabilities to encompass broader security implications for enterprise environments. Organizations using affected versions of Acrobat Reader face potential data breaches, lateral movement opportunities for attackers, and increased risk of persistent threats within their networks. The vulnerability affects not only individual users but also creates potential for supply chain attacks if organizations distribute malicious PDF files through legitimate channels. Security teams must consider the risk of privilege escalation, as the executed code runs with the same user privileges as the Acrobat Reader process, potentially allowing attackers to access local files, modify system configurations, or establish persistent backdoors. This vulnerability also highlights the importance of timely patch management and user education programs, as the attack vector relies heavily on user behavior rather than purely technical exploitation methods.
Organizations should prioritize immediate remediation through patch management processes to address this vulnerability across all affected versions of Acrobat Reader. The recommended mitigation strategy includes deploying security patches from Adobe as soon as they become available, implementing network-based controls to block suspicious PDF files, and establishing user awareness training programs to reduce the risk of successful social engineering attacks. Additional protective measures such as application whitelisting, sandboxing of PDF processing, and monitoring for unusual file access patterns can provide defense in depth. Security teams should also consider implementing automated vulnerability scanning tools to identify systems running unpatched versions and establish incident response procedures specifically tailored to handle potential exploitation attempts. The vulnerability underscores the critical importance of maintaining up-to-date security software and the need for comprehensive security policies that address both technical controls and user behavior modification.