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Vulnerabilities

CVE-2026-26171

High
CWE-400 — Weakness Type
Published: Apr 14, 2026  ·  Modified: Apr 21, 2026  ·  Source: NVD
CVSS v3
7.5
🔗 NVD Official
📄 Description (English)

Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.

🤖 AI Executive Summary

CVE-2026-26171 is a high-severity denial-of-service vulnerability in .NET framework affecting uncontrolled resource consumption (CWE-400). An unauthenticated attacker can exploit this remotely to exhaust system resources and cause service disruption. Currently, no patch is available, making immediate compensating controls critical for Saudi organizations relying on .NET infrastructure.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 4, 2026 00:19
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), telecommunications providers (STC, Mobily), and energy sector (ARAMCO, SEC). .NET is widely deployed in enterprise applications across these critical sectors. Denial-of-service attacks could disrupt financial transactions, government services, telecom infrastructure, and energy management systems. Healthcare institutions using .NET-based systems are also at risk.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Telecommunications Energy and Utilities Healthcare E-commerce Insurance
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Inventory all .NET deployments across your organization and identify critical systems
2. Implement network-level rate limiting and connection throttling on .NET application endpoints
3. Deploy Web Application Firewalls (WAF) with resource consumption detection rules
4. Enable request size limits and timeout configurations in IIS/application servers
5. Implement DDoS mitigation strategies and traffic filtering
6. Monitor CPU, memory, and connection pool utilization in real-time

COMPENSATING CONTROLS:
7. Restrict network access to .NET applications using firewall rules and VPNs
8. Implement API rate limiting and request throttling at application level
9. Configure connection pooling limits in database and service connections
10. Deploy load balancers with health checks to isolate affected instances
11. Establish incident response procedures for resource exhaustion scenarios

DETECTION RULES:
12. Monitor for abnormal spike in HTTP requests from single source
13. Alert on sustained high CPU/memory consumption without legitimate cause
14. Track connection pool exhaustion events in application logs
15. Monitor for repeated connection attempts with varying payloads
16. Watch for IIS worker process recycling patterns

PATCHING STRATEGY:
17. Subscribe to Microsoft .NET security advisories for patch availability
18. Prepare patch testing environment immediately upon patch release
19. Establish expedited patching timeline for critical systems
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع نشرات .NET عبر مؤسستك وحدد الأنظمة الحرجة
2. طبق تحديد معدل على مستوى الشبكة وتقليل الاتصالات على نقاط نهاية تطبيقات .NET
3. نشر جدران حماية تطبيقات الويب (WAF) مع قواعد كشف استهلاك الموارد
4. فعّل حدود حجم الطلب وإعدادات المهلة الزمنية في IIS/خوادم التطبيقات
5. طبق استراتيجيات تخفيف DDoS وتصفية حركة المرور
6. راقب استخدام CPU والذاكرة وتجمع الاتصالات في الوقت الفعلي

الضوابط التعويضية:
7. قيّد الوصول إلى شبكة تطبيقات .NET باستخدام قواعد جدار الحماية والشبكات الخاصة الافتراضية
8. طبق تحديد معدل API وتقليل الطلبات على مستوى التطبيق
9. كوّن حدود تجمع الاتصالات في قواعد البيانات والخدمات
10. نشر موازنات الحمل مع فحوصات الصحة لعزل الحالات المتأثرة
11. أنشئ إجراءات الاستجابة للحوادث لسيناريوهات استنزاف الموارد

قواعد الكشف:
12. راقب الارتفاع غير الطبيعي في طلبات HTTP من مصدر واحد
13. أصدر تنبيهات عند استهلاك CPU/الذاكرة المرتفع المستمر بدون سبب شرعي
14. تتبع أحداث استنزاف تجمع الاتصالات في سجلات التطبيق
15. راقب محاولات الاتصال المتكررة مع حمولات مختلفة
16. راقب أنماط إعادة تدوير عملية عامل IIS

استراتيجية التصحيح:
17. اشترك في استشارات أمان .NET من Microsoft للحصول على توفر التصحيحات
18. جهز بيئة اختبار التصحيح فوراً عند توفر التصحيح
19. أنشئ جدول زمني معجل للتصحيح للأنظمة الحرجة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities ECC 2024 A.12.3.1 - Segregation of networks ECC 2024 A.12.1.2 - Change management procedures ECC 2024 A.8.2.3 - User access management
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset management and vulnerability identification SAMA CSF PR.IP-12 - System and information integrity SAMA CSF DE.CM-1 - Detection and monitoring SAMA CSF RS.RP-1 - Response planning
🟡 ISO 27001:2022
ISO 27001:2022 A.12.3.1 - Segregation of networks ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities ISO 27001:2022 A.8.1.1 - Inventory of assets ISO 27001:2022 A.12.1.2 - Change management
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patches and updates PCI DSS 11.2 - Vulnerability scanning PCI DSS 6.5.1 - Injection flaws prevention
📊 CVSS Score
7.5
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityN — None / Network
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.5
CWECWE-400
EPSS0.59%
Exploit No
Patch ✗ No
Published 2026-04-14
Source Feed nvd
Views 6
🇸🇦 Saudi Risk Score
8.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-400
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