📄 Description (English)
Authentication bypass using an alternate path or channel in Azure Windows Virtual Machine Agent allows an authorized attacker to elevate privileges locally.
🤖 AI Executive Summary
CVE-2026-26117 is a high-severity authentication bypass vulnerability in Azure Windows Virtual Machine Agent affecting Arc-enabled servers, allowing authorized local attackers to escalate privileges. With a CVSS score of 7.8 and no public exploit currently available, this poses significant risk to hybrid cloud environments. Immediate patching is critical for organizations leveraging Azure Arc for on-premises server management.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 29, 2026 09:07
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations utilizing Azure Arc for hybrid cloud infrastructure face significant risk, particularly: (1) Banking sector (SAMA-regulated institutions) managing critical financial systems on-premises with Azure Arc connectivity; (2) Government entities (NCA oversight) using hybrid cloud for sensitive data processing; (3) Energy sector (ARAMCO, downstream operators) managing SCADA/ICS systems with cloud integration; (4) Telecom providers (STC, Mobily) operating hybrid infrastructure; (5) Healthcare organizations managing patient data across on-premises and cloud environments. Privilege escalation could lead to unauthorized access to sensitive systems, data exfiltration, and compliance violations under SAMA CSF and NCA ECC frameworks.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Energy and Utilities
Telecommunications
Healthcare
Manufacturing
Retail and E-commerce
🎯 MITRE ATT&CK Techniques
T1548.004 - Abuse Elevation Control Mechanism: Bypass User Account Control
T1134.003 - Access Token Manipulation: Make and Impersonate Token
T1078.003 - Valid Accounts: Local Accounts
T1547.001 - Boot or Logon Autostart Execution: Registry Run Keys / Startup Folder
T1547.014 - Boot or Logon Autostart Execution: Active Setup
T1547.015 - Boot or Logon Autostart Execution: Login Hook
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Azure Arc-enabled servers in your environment using Azure Resource Graph queries
2. Prioritize patching for servers handling sensitive data (financial, healthcare, government)
3. Implement access controls restricting local administrative access
PATCHING GUIDANCE:
1. Deploy latest Azure Connected Machine Agent updates immediately via Windows Update or WSUS
2. For WSUS-managed environments, approve and deploy patches to all Arc-enabled servers within 48 hours
3. Verify patch installation using: Get-Service WindowsAzureGuestAgent | Select-Object Status
COMPENSATING CONTROLS (if patching delayed):
1. Restrict local administrative group membership to essential personnel only
2. Enable Windows Defender Credential Guard on affected servers
3. Implement Just-In-Time (JIT) access for administrative privileges
4. Monitor Event Viewer for authentication anomalies (Event ID 4625, 4720)
DETECTION RULES:
1. Monitor for unexpected privilege escalation attempts in Security Event Log (Event ID 4688 with elevated tokens)
2. Alert on Arc agent service restarts outside maintenance windows
3. Track modifications to Azure Connected Machine Agent configuration files
4. Monitor for lateral movement from Arc-enabled servers to other infrastructure
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الخوادم المفعلة بـ Azure Arc في بيئتك باستخدام استعلامات Azure Resource Graph
2. إعطاء الأولوية لتصحيح الخوادم التي تتعامل مع البيانات الحساسة (مالية، صحية، حكومية)
3. تنفيذ عناصر تحكم الوصول تقيد الوصول الإداري المحلي
إرشادات التصحيح:
1. نشر أحدث تحديثات وكيل Azure Connected Machine فورًا عبر Windows Update أو WSUS
2. بالنسبة للبيئات المدارة بـ WSUS، وافق على نشر التصحيحات لجميع الخوادم المفعلة بـ Arc خلال 48 ساعة
3. التحقق من تثبيت التصحيح باستخدام: Get-Service WindowsAzureGuestAgent | Select-Object Status
عناصر التحكم البديلة (إذا تأخر التصحيح):
1. تقييد عضوية مجموعة المسؤولين المحليين للموظفين الأساسيين فقط
2. تفعيل Windows Defender Credential Guard على الخوادم المتأثرة
3. تنفيذ الوصول في الوقت المناسب (JIT) للامتيازات الإدارية
4. مراقبة Event Viewer للشذوذ في المصادقة (معرف الحدث 4625، 4720)
قواعد الكشف:
1. مراقبة محاولات تصعيد الامتيازات غير المتوقعة في سجل أحداث الأمان (معرف الحدث 4688 مع الرموز المرفوعة)
2. التنبيه على إعادة تشغيل خدمة Arc agent خارج نوافذ الصيانة
3. تتبع التعديلات على ملفات تكوين وكيل Azure Connected Machine
4. مراقبة الحركة الجانبية من الخوادم المفعلة بـ Arc إلى البنية الأساسية الأخرى
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Access control policies and procedures
A.5.2.1 - User registration and de-registration
A.5.3.1 - Privileged access rights management
A.8.2.1 - User endpoint devices
A.8.3.1 - Information access restriction
🔵 SAMA CSF
ID.AM-1 - Asset Management (inventory of Arc-enabled servers)
PR.AC-1 - Access Control Policy (privilege escalation prevention)
PR.AC-4 - Access Rights Management (local admin restrictions)
DE.CM-1 - Detection and Analysis (monitoring for exploitation)
RS.MI-1 - Incident Response (containment of compromised systems)
🟡 ISO 27001:2022
A.5.1.1 - Policies for information security
A.5.2.1 - Information security responsibilities
A.5.3.1 - Segregation of duties
A.6.1.1 - Screening
A.6.2.1 - Terms and conditions of employment
A.8.1.1 - User endpoint devices
A.8.2.1 - Privileged access rights
A.8.3.1 - Information access restriction
🟣 PCI DSS v4.0.1
Requirement 2.1 - Default security parameters
Requirement 7 - Restrict access to data by business need to know
Requirement 8 - Identify and authenticate access to network resources
📦 Affected Products / CPE 1 entries
microsoft:arc_enabled_servers_azure_connected_machine_agent