CVE-2026-48373
Summary
by MITRE • 07/17/2026
Acrobat Reader is affected by a Heap-based Buffer Overflow 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 • 07/17/2026
This heap-based buffer overflow vulnerability in Adobe Acrobat Reader represents a critical security flaw that operates under the Common Weakness Enumeration category CWE-121 Heap-based Buffer Overflow, where insufficient bounds checking allows attackers to write beyond allocated memory boundaries. The vulnerability specifically affects the PDF rendering engine within Acrobat Reader, which processes untrusted document content without adequate input validation mechanisms. When a maliciously crafted PDF file is opened by an affected version of the application, the buffer overflow occurs during the parsing of specific PDF elements such as embedded objects or compressed streams, leading to potential memory corruption that can be exploited to execute arbitrary code with the privileges of the current user context.
The exploitation pathway requires social engineering through user interaction, making this vulnerability particularly dangerous in enterprise environments where users may inadvertently open malicious attachments or download compromised documents from untrusted sources. This attack vector aligns with ATT&CK technique T1204.002 User Execution: Malicious File, where adversaries rely on users to execute malicious payloads. The vulnerability's impact extends beyond simple code execution as it can potentially lead to full system compromise when combined with other exploitation techniques or when the user has elevated privileges within the application context.
The operational impact of this vulnerability is significant for organizations relying on Acrobat Reader for document processing, as it creates an attack surface that can be leveraged for data exfiltration, persistence mechanisms, or lateral movement within networks. Attackers can craft PDF files containing specially designed payloads that trigger the buffer overflow when opened, potentially bypassing standard security controls such as antivirus software or network firewalls that may not detect the malicious content until it is processed by the vulnerable application. Organizations must consider the widespread use of Acrobat Reader across various departments and user roles, making this vulnerability particularly attractive to threat actors seeking broad impact.
Mitigation strategies should include immediate patch management deployment for all affected versions of Adobe Acrobat Reader, as well as implementation of additional security controls such as application whitelisting policies that restrict execution of unauthorized PDF viewers. Network-based protections can be enhanced through content filtering solutions that scan PDF attachments for suspicious patterns or embedded malicious code. Users should be educated about the risks of opening unexpected PDF files from untrusted sources, and organizations should establish strict document approval processes for sensitive environments. The vulnerability also highlights the importance of keeping all software components updated, as this type of memory corruption issue typically requires immediate remediation to prevent exploitation in active threat campaigns.