📄 Description (English)
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
🤖 AI Executive Summary
CVE-2026-23657 is a use-after-free vulnerability in Microsoft Office Word with a CVSS score of 7.8, allowing local code execution through crafted documents. Currently, no patch is available and no public exploits exist, but the vulnerability poses significant risk to organizations relying on Word for document processing. Immediate mitigation through compensating controls and user awareness is critical until Microsoft releases a patch.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 29, 2026 00:27
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), and large enterprises using Microsoft Office extensively. Saudi organizations in financial services, healthcare (MOH), energy sector (ARAMCO, SEC), and telecommunications (STC, Mobily) are particularly vulnerable. The local code execution capability could lead to lateral movement, data exfiltration, and system compromise, especially if weaponized through spear-phishing campaigns targeting Saudi entities.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Telecommunications
Education
Large Enterprises
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Disable Microsoft Office macros globally via Group Policy (User Configuration > Administrative Templates > Microsoft Office > Security Settings > Macro Security)
2. Implement application whitelisting to restrict Word.exe execution to trusted locations only
3. Deploy email gateway controls to block suspicious Office documents with embedded objects
4. Restrict local administrator privileges to limit code execution impact
COMPENSATING CONTROLS:
5. Isolate Word processing on dedicated, non-critical systems when possible
6. Implement file integrity monitoring on critical Word documents
7. Use Microsoft Defender for Office 365 with advanced threat protection enabled
8. Enable Attack Surface Reduction (ASR) rules: Block Office applications from creating child processes, Block Office from injecting code into other processes
DETECTION:
9. Monitor for suspicious Word.exe process creation with unusual parent processes
10. Alert on Word processes spawning cmd.exe, powershell.exe, or other system utilities
11. Track file access patterns to %TEMP% and %APPDATA% directories during Word operations
12. Monitor for abnormal memory access patterns using EDR solutions
PATCHING:
13. Subscribe to Microsoft Security Updates and apply immediately upon patch release
14. Maintain updated inventory of all Office installations for rapid patch deployment
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تعطيل وحدات ماكروز Microsoft Office عالمياً عبر Group Policy (User Configuration > Administrative Templates > Microsoft Office > Security Settings > Macro Security)
2. تطبيق التحكم في تطبيقات القائمة البيضاء لتقييد تنفيذ Word.exe في المواقع الموثوقة فقط
3. نشر ضوابط بوابة البريد الإلكتروني لحجب مستندات Office المريبة التي تحتوي على كائنات مضمنة
4. تقييد امتيازات المسؤول المحلي لتحديد تأثير تنفيذ الأكواد
الضوابط البديلة:
5. عزل معالجة Word على أنظمة مخصصة وغير حرجة عند الإمكان
6. تطبيق مراقبة سلامة الملفات على مستندات Word الحرجة
7. استخدام Microsoft Defender for Office 365 مع تفعيل الحماية من التهديدات المتقدمة
8. تفعيل قواعد Attack Surface Reduction: منع تطبيقات Office من إنشاء عمليات فرعية، منع Office من حقن الأكواد في عمليات أخرى
الكشف:
9. مراقبة إنشاء عمليات Word.exe المريبة مع عمليات أب غير عادية
10. تنبيهات عند قيام عمليات Word بتشغيل cmd.exe أو powershell.exe أو أدوات نظام أخرى
11. تتبع أنماط الوصول إلى ملفات %TEMP% و %APPDATA% أثناء عمليات Word
12. مراقبة أنماط الوصول إلى الذاكرة غير الطبيعية باستخدام حلول EDR
التصحيح:
13. الاشتراك في تحديثات أمان Microsoft وتطبيقها فوراً عند إصدار التصحيح
14. الحفاظ على جرد محدث لجميع تثبيتات Office لنشر التصحيحات بسرعة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures
A.8.1.1 - User access management
A.12.2.1 - Change management procedures
A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification
PR.IP-12 - Software, firmware, and information integrity mechanisms
DE.CM-8 - Vulnerability scans are performed
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy
A.12.2.1 - Change management
🟣 PCI DSS v4.0.1
6.2 - Ensure security patches are installed within one month of release
🔗 References & Sources 1