📄 Description (English)
Parsing logic flaws cause non-signature data to be misidentified as valid signatures when processing malformed form field hierarchies, leading to invalid memory writes and program crashes during internal data structure construction.
🤖 AI Executive Summary
CVE-2026-5941 is a high-severity parsing vulnerability in Foxit PDF Editor and Reader that allows attackers to craft malformed PDF files with invalid form field hierarchies, causing the application to misidentify non-signature data as valid signatures. This leads to invalid memory writes and program crashes, potentially enabling denial of service or code execution attacks. The vulnerability affects multiple versions with no patch currently available, requiring immediate compensating controls.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 30, 2026 23:49
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations heavily reliant on PDF processing: (1) Banking/SAMA-regulated institutions using Foxit for document verification and digital signature validation in financial transactions; (2) Government agencies (NCA, CITC) processing official documents and digital signatures; (3) Healthcare sector (MOH) handling patient records and medical documentation; (4) Energy sector (ARAMCO, SEC) managing technical documentation; (5) Telecom operators (STC, Mobily) processing contracts and compliance documents. The parsing flaw could be exploited to bypass signature verification, leading to acceptance of fraudulent documents or service disruption.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Telecommunications
Legal Services
Insurance
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Inventory all Foxit PDF Editor and Reader installations across the organization
2. Restrict user access to Foxit applications until patch availability
3. Implement email gateway rules to block suspicious PDF attachments with malformed form fields
4. Disable PDF signature verification features in Foxit if not critical to operations
COMPENSATING CONTROLS:
1. Deploy alternative PDF readers (Adobe Reader, LibreOffice) for document processing
2. Implement file validation: scan PDFs with dedicated malware analysis tools before opening in Foxit
3. Use network segmentation to isolate systems running Foxit from critical infrastructure
4. Enable application whitelisting to prevent Foxit execution on sensitive systems
5. Monitor for CVE-2026-5941 patch releases from Foxit and apply immediately upon availability
DETECTION RULES:
1. Monitor for Foxit process crashes (Event ID 1000 in Windows Event Viewer)
2. Alert on PDF files with nested or malformed form field structures
3. Track failed signature validation attempts in Foxit logs
4. Monitor memory access violations associated with Foxit processes
5. Implement YARA rules to detect PDFs with suspicious form field hierarchies
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حصر جميع تثبيتات محرر PDF وقارئ Foxit عبر المنظمة
2. تقييد وصول المستخدمين إلى تطبيقات Foxit حتى توفر التصحيح
3. تطبيق قواعد بوابة البريد الإلكتروني لحجب مرفقات PDF المريبة ذات حقول النماذج المعيبة
4. تعطيل ميزات التحقق من توقيع PDF في Foxit إذا لم تكن حرجة للعمليات
الضوابط البديلة:
1. نشر قارئات PDF بديلة (Adobe Reader، LibreOffice) لمعالجة المستندات
2. تطبيق التحقق من الملفات: مسح ملفات PDF بأدوات تحليل البرامج الضارة المخصصة قبل الفتح في Foxit
3. استخدام تقسيم الشبكة لعزل الأنظمة التي تعمل بـ Foxit عن البنية التحتية الحرجة
4. تفعيل قائمة التطبيقات المسموحة لمنع تنفيذ Foxit على الأنظمة الحساسة
5. مراقبة إصدارات تصحيح CVE-2026-5941 من Foxit وتطبيقها فوراً عند توفرها
قواعد الكشف:
1. مراقبة أعطال عملية Foxit (معرف الحدث 1000 في عارض أحداث Windows)
2. تنبيه على ملفات PDF ذات هياكل حقول نماذج متداخلة أو معيبة
3. تتبع محاولات التحقق من التوقيع الفاشلة في سجلات Foxit
4. مراقبة انتهاكات الوصول إلى الذاكرة المرتبطة بعمليات Foxit
5. تطبيق قواعد YARA للكشف عن ملفات PDF ذات هياكل حقول نماذج مريبة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy
A.12.3.1 - Configuration management
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification
PR.IP-12 - Software development security practices
DE.CM-8 - Vulnerability scans
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy
A.12.3.1 - Configuration management
A.12.2.1 - Change management procedures
🟣 PCI DSS v4.0.1
6.2 - Security patches and updates
6.5.1 - Injection flaws
11.2 - Vulnerability scanning
📦 Affected Products / CPE 3 entries
foxit:pdf_editor
foxit:pdf_editor
foxit:pdf_reader