📄 Description (English)
Microsoft Office Remote Code Execution Vulnerability — A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user.
🤖 AI Executive Summary
CVE-2017-11826 is a critical remote code execution vulnerability in Microsoft Office that allows attackers to execute arbitrary code by exploiting improper handling of objects in memory. This vulnerability has been actively exploited in the wild, with public exploits available, making it extremely dangerous. An attacker can craft a malicious Office document that, when opened by a user, executes code in the context of the current user. Given the ubiquity of Microsoft Office in enterprise environments, this vulnerability poses a severe risk to organizations that have not applied the available patch.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 7, 2026 18:00
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability has critical impact across virtually all Saudi sectors due to the universal use of Microsoft Office. Banking and financial institutions regulated by SAMA are at high risk as Office documents are the primary medium for business communications and could be weaponized in spear-phishing campaigns targeting financial staff. Government entities under NCA oversight, including ministries and public sector organizations, are prime targets for APT groups using this exploit. Energy sector organizations including Saudi Aramco and SABIC face significant risk from nation-state actors who have historically targeted Saudi energy infrastructure. Telecom providers (STC, Mobily, Zain) and healthcare organizations are also vulnerable. The availability of public exploits and active exploitation in the wild significantly elevates the risk for Saudi organizations, particularly those that may still run legacy or unpatched Office installations.
🏢 Affected Saudi Sectors
Banking
Government
Energy
Telecom
Healthcare
Education
Defense
Retail
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Apply Microsoft security update KB4042895 (October 2017 Patch Tuesday) immediately across all systems running Microsoft Office
2. Block suspicious Office documents at email gateways and web proxies
3. Enable Protected View and Office Protected Mode for all users
4. Disable macros and ActiveX controls in Office via Group Policy
PATCHING GUIDANCE:
- Prioritize patching all Microsoft Office installations (2007, 2010, 2013, 2016)
- Verify patch deployment using vulnerability scanning tools
- Update Microsoft Office to the latest supported version where possible
COMPENSATING CONTROLS:
- Implement Application Whitelisting to prevent unauthorized code execution
- Deploy endpoint detection and response (EDR) solutions with memory exploitation detection
- Restrict Office document types at email gateways (block RTF, DOC with embedded OLE objects)
- Implement network segmentation to limit lateral movement post-exploitation
DETECTION RULES:
- Monitor for suspicious child processes spawned by Office applications (winword.exe, excel.exe)
- Deploy YARA rules for known CVE-2017-11826 exploit samples
- Alert on Office processes making unusual network connections or spawning cmd.exe/powershell.exe
- Monitor for RTF files with malformed OLE objects in email attachments
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تطبيق تحديث الأمان من Microsoft رقم KB4042895 (تصحيحات أكتوبر 2017) فوراً على جميع الأنظمة التي تعمل بـ Microsoft Office
2. حظر مستندات Office المشبوهة على بوابات البريد الإلكتروني وخوادم الوكيل
3. تفعيل العرض المحمي ووضع الحماية في Office لجميع المستخدمين
4. تعطيل وحدات الماكرو وعناصر تحكم ActiveX في Office عبر سياسة المجموعة
إرشادات التصحيح:
- إعطاء الأولوية لتصحيح جميع تثبيتات Microsoft Office (2007، 2010، 2013، 2016)
- التحقق من نشر التصحيح باستخدام أدوات فحص الثغرات
- تحديث Microsoft Office إلى أحدث إصدار مدعوم حيثما أمكن
الضوابط التعويضية:
- تنفيذ القائمة البيضاء للتطبيقات لمنع تنفيذ التعليمات البرمجية غير المصرح بها
- نشر حلول الكشف والاستجابة لنقاط النهاية مع كشف استغلال الذاكرة
- تقييد أنواع مستندات Office على بوابات البريد الإلكتروني
- تنفيذ تجزئة الشبكة للحد من الحركة الجانبية بعد الاستغلال
قواعد الكشف:
- مراقبة العمليات الفرعية المشبوهة التي تنشئها تطبيقات Office
- نشر قواعد YARA لعينات استغلال CVE-2017-11826 المعروفة
- التنبيه عند قيام عمليات Office بإجراء اتصالات شبكة غير عادية
- مراقبة ملفات RTF ذات كائنات OLE المشوهة في مرفقات البريد الإلكتروني
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
2-3-1 (Patch Management)
2-5-1 (Malware Protection)
2-6-1 (Email Security)
2-2-1 (Asset Management)
2-9-1 (Vulnerability Management)
🔵 SAMA CSF
3.3.3 (Patch Management)
3.3.4 (Malware Protection)
3.3.5 (Email and Messaging Security)
3.3.7 (Vulnerability Management)
3.4.1 (Incident Detection)
🟡 ISO 27001:2022
A.8.8 (Management of Technical Vulnerabilities)
A.8.7 (Protection Against Malware)
A.8.23 (Web Filtering)
A.5.24 (Information Security Incident Management)
🟣 PCI DSS v4.0
6.3.3 (Install Critical Security Patches)
5.2 (Deploy Anti-Malware)
11.3 (Vulnerability Scanning)
6.2 (Protect System Components from Known Vulnerabilities)
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Office