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Vulnerabilities

CVE-2026-26183

High
CWE-284 — Weakness Type
Published: Apr 14, 2026  ·  Modified: Apr 21, 2026  ·  Source: NVD
CVSS v3
7.8
🔗 NVD Official
📄 Description (English)

Improper access control in Windows RPC API allows an authorized attacker to elevate privileges locally.

🤖 AI Executive Summary

CVE-2026-26183 is a high-severity privilege escalation vulnerability in Windows RPC API affecting authorized local users. With a CVSS score of 7.8, this improper access control flaw allows attackers with valid credentials to escalate privileges on affected systems. Currently, no patch is available and no public exploits exist, but the vulnerability poses significant risk to Windows-based infrastructure across Saudi organizations.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 29, 2026 09:05
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi banking sector (SAMA-regulated institutions), government agencies under NCA oversight, healthcare organizations, and energy sector entities. Windows RPC is fundamental to Active Directory and domain authentication used extensively across Saudi enterprise networks. Privilege escalation attacks could compromise critical systems in ARAMCO operations, STC telecommunications infrastructure, and financial institutions. The impact is particularly severe for organizations with privileged user accounts accessing sensitive data or critical infrastructure controls.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare Energy and Oil & Gas Telecommunications Critical Infrastructure Defense and Military
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all Windows systems running RPC services across your organization
2. Implement principle of least privilege - audit and restrict local administrator accounts
3. Enable Windows Event Logging for RPC API calls (Event ID 5140, 5145)
4. Monitor for suspicious RPC authentication attempts and privilege escalation patterns

Compensating Controls (until patch available):
1. Restrict RPC endpoint access using Windows Firewall rules (TCP/UDP 135, 445)
2. Disable unnecessary RPC services and endpoints
3. Implement application whitelisting to prevent unauthorized RPC client execution
4. Use AppLocker to restrict execution of suspicious processes attempting privilege escalation
5. Enable Credential Guard on Windows 10/11 and Server 2016+ to protect cached credentials

Detection Rules:
1. Monitor for RPC API calls with elevated privilege requests from non-system accounts
2. Alert on failed RPC authentication followed by successful escalation attempts
3. Track creation of new local administrator accounts or group membership changes
4. Monitor for unusual RPC service restarts or modifications

Patching Strategy:
1. Subscribe to Microsoft Security Updates and apply patches immediately upon release
2. Test patches in isolated lab environment before production deployment
3. Prioritize patching for systems with high-privilege user access
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع أنظمة Windows التي تقوم بتشغيل خدمات RPC عبر مؤسستك
2. طبق مبدأ الحد الأدنى من الامتيازات - قم بمراجعة وتقييد حسابات المسؤول المحلي
3. فعّل تسجيل أحداث Windows لاستدعاءات RPC API (معرف الحدث 5140، 5145)
4. راقب محاولات المصادقة المريبة في RPC وأنماط رفع الصلاحيات

الضوابط البديلة (حتى توفر التصحيح):
1. قيّد وصول نقطة نهاية RPC باستخدام قواعد جدار الحماية في Windows (TCP/UDP 135، 445)
2. عطّل خدمات ونقاط نهاية RPC غير الضرورية
3. طبّق القائمة البيضاء للتطبيقات لمنع تنفيذ عميل RPC غير المصرح به
4. استخدم AppLocker لتقييد تنفيذ العمليات المريبة التي تحاول رفع الصلاحيات
5. فعّل Credential Guard على Windows 10/11 و Server 2016+ لحماية بيانات الاعتماد المخزنة مؤقتاً

قواعد الكشف:
1. راقب استدعاءات RPC API مع طلبات الامتيازات المرتفعة من حسابات غير النظام
2. أصدر تنبيهات عند فشل المصادقة في RPC متبوعة بمحاولات رفع صلاحيات ناجحة
3. تتبع إنشاء حسابات مسؤول محلية جديدة أو تغييرات عضوية المجموعة
4. راقب إعادة تشغيل خدمة RPC غير العادية أو التعديلات

استراتيجية التصحيح:
1. اشترك في تحديثات أمان Microsoft وطبّق التصحيحات فوراً عند إصدارها
2. اختبر التصحيحات في بيئة معملية معزولة قبل نشرها في الإنتاج
3. أعطِ الأولوية لتصحيح الأنظمة التي يصل إليها مستخدمون بامتيازات عالية
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures A.6.1.1 - Access control policy A.6.2.1 - User registration and de-registration A.6.2.2 - User access provisioning A.9.2.1 - User endpoint devices A.9.4.1 - Restriction of access to information
🔵 SAMA CSF
ID.AC-1 - Identities and credentials are issued and managed ID.AC-2 - Physical and logical assets are managed and protected PR.AC-1 - Identities and credentials are managed for authorized devices and users PR.AC-3 - Access is managed through least privilege principles DE.CM-1 - The network is monitored to detect potential cybersecurity events
🟡 ISO 27001:2022
5.3 - Segregation of duties 6.2 - Privileged access rights 8.2 - Privileged access rights 8.3 - Information access restriction 8.4 - Access to source code
🟣 PCI DSS v4.0.1
2.1 - Default security parameters 6.2 - Security patches and updates 7.1 - Limit access to system components 8.1 - User identification and authentication
📊 CVSS Score
7.8
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.8
CWECWE-284
EPSS0.06%
Exploit No
Patch ✗ No
Published 2026-04-14
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
7.8
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-284
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