📄 Description (English)
Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network.
🤖 AI Executive Summary
CVE-2026-40415 is a critical use-after-free vulnerability in Windows TCP/IP stack affecting Windows 10 and 11 versions, allowing remote code execution without authentication. With a CVSS score of 8.1 and no patch currently available, this poses an immediate threat to Saudi organizations relying on Windows infrastructure. The vulnerability can be exploited over the network, making it particularly dangerous for internet-facing systems and critical infrastructure.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 19, 2026 11:49
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses severe risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), healthcare providers, energy sector (ARAMCO and related entities), and telecommunications companies (STC, Mobily). Windows 10/11 systems are ubiquitous across these sectors. The TCP/IP stack vulnerability enables remote code execution on domain controllers, servers, and workstations without user interaction, potentially compromising critical financial systems, government networks, and industrial control systems. Organizations with legacy Windows 10 1809 deployments face heightened risk due to extended support timelines.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare and Medical Services
Energy and Utilities
Telecommunications
Critical Infrastructure
Defense and Security
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.7
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Inventory all Windows 10 and Windows 11 systems across your organization, prioritizing internet-facing servers and critical infrastructure
2. Implement network segmentation to isolate critical systems and limit TCP/IP exposure
3. Enable Windows Defender Exploit Guard and enforce Control Flow Guard (CFG) on all systems
4. Deploy network-based intrusion detection signatures monitoring for TCP/IP anomalies
COMPENSATING CONTROLS (until patch available):
5. Implement strict firewall rules limiting TCP/IP traffic to only necessary ports and sources
6. Deploy Web Application Firewalls (WAF) and network intrusion prevention systems (IPS)
7. Enable Enhanced Mitigation Experience Toolkit (EMET) or equivalent security hardening
8. Restrict administrative access and enforce multi-factor authentication (MFA)
9. Monitor for suspicious network activity and process execution anomalies
DETECTION RULES:
10. Monitor for abnormal TCP/IP stack behavior, memory corruption indicators, and unexpected process spawning from network services
11. Alert on any attempts to exploit memory management in tcpip.sys or related drivers
12. Track Windows Update status and prepare for emergency patching once available
13. Conduct daily vulnerability scans and threat hunting for indicators of compromise
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع أنظمة Windows 10 و Windows 11 في مؤسستك، مع إعطاء الأولوية للخوادم المتصلة بالإنترنت والبنية التحتية الحرجة
2. تطبيق تقسيم الشبكة لعزل الأنظمة الحرجة وتحديد تعرض TCP/IP
3. تفعيل Windows Defender Exploit Guard وفرض Control Flow Guard (CFG) على جميع الأنظمة
4. نشر توقيعات كشف الاختراق على مستوى الشبكة لمراقبة شذوذ TCP/IP
الضوابط البديلة (حتى توفر التصحيح):
5. تطبيق قواعد جدار الحماية الصارمة لتحديد حركة TCP/IP للمنافذ والمصادر الضرورية فقط
6. نشر جدران تطبيقات الويب (WAF) وأنظمة منع الاختراق على الشبكة (IPS)
7. تفعيل Enhanced Mitigation Experience Toolkit (EMET) أو أدوات تقسية الأمان المكافئة
8. تقييد الوصول الإداري وفرض المصادقة متعددة العوامل (MFA)
9. مراقبة النشاط الشبكي المريب وشذوذ تنفيذ العمليات
قواعد الكشف:
10. مراقبة السلوك غير الطبيعي لمكدس TCP/IP ومؤشرات تلف الذاكرة وتوليد العمليات غير المتوقعة من خدمات الشبكة
11. تنبيه على أي محاولات لاستغلال إدارة الذاكرة في tcpip.sys أو برامج التشغيل ذات الصلة
12. تتبع حالة Windows Update والتحضير للتصحيح الطارئ عند توفره
13. إجراء فحوصات الثغرات اليومية والبحث عن التهديدات بحثاً عن مؤشرات الاختراق
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
ECC 2024 A.14.2.1 - Secure development policy
ECC 2024 A.12.2.1 - Monitoring of system use
ECC 2024 A.13.1.1 - Network security perimeter
🔵 SAMA CSF
ID.RA-1 - Asset management and criticality assessment
PR.IP-12 - System and information integrity
DE.CM-1 - Detection processes and tools
RS.MI-1 - Incident response and recovery
🟡 ISO 27001:2022
A.12.2.1 - Monitoring of information systems
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy
A.13.1.1 - Network security perimeter
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches and updates
Requirement 11.2 - Vulnerability scanning
Requirement 12.2 - Configuration standards
📦 Affected Products / CPE 20 entries
microsoft:windows_10_1809
microsoft:windows_10_1809
microsoft:windows_10_21h2
microsoft:windows_10_21h2
microsoft:windows_10_21h2
microsoft:windows_10_22h2
microsoft:windows_10_22h2
microsoft:windows_10_22h2
microsoft:windows_11_23h2
microsoft:windows_11_23h2
microsoft:windows_11_24h2
microsoft:windows_11_24h2
microsoft:windows_11_25h2
microsoft:windows_11_25h2
microsoft:windows_11_26h1
microsoft:windows_11_26h1
microsoft:windows_server_2019
microsoft:windows_server_2022
microsoft:windows_server_2022_23h2
microsoft:windows_server_2025