CVE-2026-57251 in PDF Editor
Summary
by MITRE • 07/08/2026
The application opens a PDF, but the cloud-like appearance of the construction process lacks proper setting of an upper limit and consistency checks. Out-of-bounds access to the underlying array is exposed, ultimately leading to a crash of the application.
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Analysis
by VulDB Data Team • 07/08/2026
This vulnerability represents a classic buffer overflow condition that occurs during PDF processing within the application's rendering engine. The flaw manifests when the software attempts to parse PDF constructs that exhibit cloud-like visual characteristics, which require complex mathematical calculations and array manipulations for proper display. The absence of proper bounds checking mechanisms allows the application to access memory locations beyond the allocated array boundaries, creating a predictable crash scenario that can be exploited by malicious actors.
The technical implementation of this vulnerability stems from inadequate input validation during PDF parsing operations, specifically when handling graphical elements that utilize cloud-like patterns or constructions. These visual components often require dynamic memory allocation and array indexing operations where the software fails to verify that array access indices remain within acceptable ranges. The lack of consistent boundary checks creates a scenario where crafted malicious PDF files can trigger out-of-bounds memory access, leading to application instability and potential system compromise.
From an operational perspective, this vulnerability exposes the application to denial of service attacks and potentially arbitrary code execution depending on the underlying architecture and memory management practices. The crash condition occurs during normal operation when legitimate users attempt to open PDF documents containing specially crafted cloud-like constructions, making this a significant security concern for organizations relying on PDF processing capabilities. The vulnerability aligns with CWE-129 which addresses insufficient bounds checking in array indexing operations, and represents a direct violation of secure coding practices outlined in various industry standards including those from the OWASP Foundation.
The impact extends beyond simple application crashes to potential privilege escalation scenarios, particularly when the PDF viewer operates with elevated system privileges or interacts with sensitive data processing functions. Attackers can leverage this vulnerability through social engineering tactics by distributing malicious PDF files that trigger the crash condition upon normal opening procedures. The exploitability of this vulnerability increases significantly in environments where automated PDF processing occurs without proper sandboxing or memory protection mechanisms, creating opportunities for persistent attacks against vulnerable systems.
Recommended mitigations include implementing comprehensive bounds checking routines before any array access operations during PDF parsing, establishing proper input validation for all graphical elements including cloud-like constructions, and deploying defensive programming practices such as stack canaries and address space layout randomization. Organizations should also consider implementing sandboxing techniques for PDF processing components to limit potential damage from successful exploitation attempts, while maintaining regular updates to ensure the latest security patches are applied to prevent known vulnerabilities from being exploited in real-world scenarios.