CVE-2026-91795

Analyzed Analyzed - Analysis Complete

Foxit PDF Editor Read Access Violation via Encryption Metadata

Publication date: 2026-09-23

Last updated on: 2026-10-08

Assigner: Foxit

Description

Foxit PDF Editor/Reader's FileOpen plugin did not adequately validate certain encryption metadata in specially crafted PDF files. This could leave an internal pointer in an invalid state, resulting in chained read and write access violations and potentially enabling arbitrary code execution.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-23

Last Modified

2026-10-08

Generated

2026-10-13

AI Q&A

2026-09-23

EPSS Evaluated

2026-10-12

NVD

CVE-2026-91795

EUVD

EUVD-2026-85127

Affected Vendors & Products

Vendor	Product	Version / Range
foxit	pdf_editor	From 2023.1.0.15510 (inc) to 2023.3.0.23028 (inc)
foxit	pdf_editor	From 2024.1.0.23997 (inc) to 2024.4.1.27687 (inc)
foxit	pdf_editor	From 2025.1.0.27937 (inc) to 2025.3.0.35737 (inc)
foxit	pdf_editor	to 13.2.5.63482 (inc)
foxit	pdf_editor	From 14.0.0.33046 (inc) to 14.0.7.33751 (inc)
foxit	pdf_editor	From 2026.1.0.36452 (inc) to 2026.2.0.39747 (inc)
foxit	pdf_reader	to 2026.2.0.39747 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-822	The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.

Attack-Flow Graph

Executive Summary

Foxit PDF Editor or Reader's FileOpen plugin fails to properly validate encryption metadata in specially crafted PDF files. This flaw causes an internal pointer to become invalid, leading to sequential read and write access violations. The issue may allow attackers to execute arbitrary code on the affected system.

Detection Guidance

This vulnerability involves improper validation of encryption metadata in PDF files processed by Foxit PDF Editor/Reader. Detection primarily relies on monitoring for crashes or unusual behavior when opening PDFs, as the issue leads to read/write access violations. No specific commands are provided in the context to directly detect this flaw.

Impact Analysis

If exploited, this vulnerability could let attackers run malicious code on your computer, potentially stealing data, installing malware, or taking control of your system. Opening a malicious PDF file could trigger the exploit without additional user interaction beyond opening the file.

Compliance Impact

This vulnerability could lead to arbitrary code execution, which may result in unauthorized access to sensitive data. This could violate GDPR's data protection requirements and HIPAA's safeguards for protected health information if exploited.

Mitigation Strategies

Update Foxit PDF Editor/Reader to the latest version to ensure the FileOpen plugin is patched. Avoid opening untrusted PDF files, especially those from unknown sources. Disable the FileOpen plugin if not required.

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