CVE-2026-103856 in FrameMaker
Summary
by MITRE • 10/13/2026
Adobe Framemaker is affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. 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 • 10/13/2026
The Adobe FrameMaker application, a widely used desktop publishing software for creating complex documents and technical manuals, is susceptible to an out-of-bounds read vulnerability within its core parsing engine. This security flaw arises from insufficient boundary checks when the application processes specific data structures or input streams contained within document files. When a maliciously crafted file is opened, the parser attempts to access memory locations that lie outside the allocated buffer boundaries. Instead of gracefully handling this invalid access request by throwing an error or halting execution, the software proceeds to read from these unauthorized memory regions. This behavior constitutes a classic out-of-bounds read condition, often categorized under CWE-125 in industry standard vulnerability classifications, which describes situations where software reads data past the end or before the beginning of the intended buffer.
The operational impact of this vulnerability centers on the potential disclosure of sensitive information residing in the application's memory space. Because the attacker can control the content of the file that triggers the out-of-bounds read, they may be able to influence what specific bytes are returned by the invalid memory access. In many cases, adjacent memory blocks contain remnants of previously processed data, including user credentials, encryption keys, session tokens, or other proprietary information stored in plaintext within the application's address space. By carefully crafting the malicious file and analyzing the resulting output from the vulnerability trigger, an attacker can systematically extract this sensitive data. This capability transforms a simple parsing error into a significant confidentiality breach, allowing for the exfiltration of critical secrets that were not intended to be exposed to external entities or untrusted inputs.
Exploitation of this flaw requires direct user interaction, specifically the act of opening a maliciously constructed document file within Adobe FrameMaker. This requirement places the vulnerability in the context of social engineering attacks where an adversary must trick a victim into loading the compromised file. Once opened, the parsing engine automatically processes the file's contents without requiring further action from the user to initiate the memory read operation. The attack aligns with techniques observed in the MITRE ATT&CK framework, particularly those involving initial access through malicious files and subsequent data exfiltration via application vulnerabilities. While it does not typically allow for remote code execution or arbitrary command injection on its own, the ability to leak sensitive memory contents can serve as a precursor step in more complex attack chains, potentially leading to privilege escalation if combined with other exploits or providing valuable intelligence for targeted phishing campaigns against high-value targets.
To mitigate this risk, organizations relying on Adobe FrameMaker should ensure that their software is updated to the latest version provided by Adobe Systems Incorporated, which includes patches addressing these boundary check deficiencies in the document parsing logic. Administrators should enforce strict policies regarding the opening of documents from untrusted sources and consider implementing application whitelisting or sandboxing solutions to limit the potential impact if a vulnerability is triggered. Additionally, users must be educated on the risks associated with opening files obtained via email attachments or downloads from unknown entities, as this remains the primary vector for exploitation. Regular security assessments and penetration testing of document processing workflows can also help identify similar parsing vulnerabilities before they are exploited in the wild.