CVE-2026-57260 in PDF Editor
Summary
by MITRE • 07/08/2026
The application opened a PDF file containing an abnormal Unity 3D object. During parsing, the application incorrectly resolved a portion of the abnormal object as a pointer and used it as a valid address, ultimately causing the application to crash.
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Analysis
by VulDB Data Team • 07/08/2026
This vulnerability represents a classic memory corruption issue that occurs during the processing of malformed multimedia content within a PDF document. The flaw manifests when an application attempts to parse a Unity 3D object embedded in a PDF file, specifically exhibiting improper handling of object references during the parsing phase. The abnormal Unity 3D object contains malformed data structures that cause the parser to incorrectly interpret certain memory locations as valid pointers, leading to an invalid memory access condition that results in application termination.
The technical implementation of this vulnerability aligns with common patterns found in buffer overflow and pointer dereference flaws, categorizing it under CWE-125: "Out-of-bounds Read" and potentially CWE-476: "NULL Pointer Dereference". The parsing logic fails to properly validate the integrity of object references within the Unity 3D structure, allowing malformed data to propagate through the application's memory management system. When the application attempts to resolve what it believes to be a valid memory pointer from the abnormal object, it encounters an invalid address that cannot be dereferenced safely.
The operational impact of this vulnerability extends beyond simple application crashes, as it represents a potential vector for more sophisticated attacks within the context of the broader ATT&CK framework. While the immediate effect is denial of service through application termination, this type of memory corruption could potentially be exploited to achieve arbitrary code execution if attackers can control the malformed input data. The vulnerability affects applications that process PDF files containing embedded multimedia content, making it particularly relevant in enterprise environments where document processing is common.
Mitigation strategies should focus on implementing robust input validation and sanitization measures during PDF parsing operations. Applications should employ proper bounds checking mechanisms to verify pointer validity before dereferencing any memory addresses extracted from parsed objects. Additionally, implementing memory protection techniques such as stack canaries, address space layout randomization, and data execution prevention can help reduce the exploitability of similar vulnerabilities. Organizations should also consider deploying sandboxing solutions that isolate PDF processing operations to prevent potential escalation of privilege or information disclosure attacks. The vulnerability demonstrates the importance of comprehensive testing for malformed input scenarios in multimedia processing components, particularly those handling complex embedded object formats like Unity 3D within document containers.