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Vulnerabilities

CVE-2026-26148

High
External initialization of trusted variables or data stores in Azure Entra ID allows an unauthorized attacker to elevate privileges locally.
CWE-454 — Weakness Type
Published: Mar 10, 2026  ·  Modified: Mar 17, 2026  ·  Source: NVD
CVSS v3
8.1
🔗 NVD Official
📄 Description (English)

External initialization of trusted variables or data stores in Azure Entra ID allows an unauthorized attacker to elevate privileges locally.

🤖 AI Executive Summary

CVE-2026-26148 is a privilege escalation vulnerability in Azure AD SSH Login Extension for Linux that allows unauthorized local attackers to elevate privileges through external initialization of trusted variables. With a CVSS score of 8.1 and affecting critical identity infrastructure, this poses significant risk to organizations relying on Azure AD for Linux system authentication. Immediate patching is required as this vulnerability could enable lateral movement and unauthorized access to sensitive systems.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 26, 2026 09:03
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability directly impacts Saudi organizations using Azure AD for Linux infrastructure authentication, particularly in: (1) Banking sector (SAMA-regulated institutions) relying on Azure AD for secure access to critical financial systems; (2) Government entities (NCA oversight) using Azure AD for identity management across federal systems; (3) Healthcare organizations managing patient data through Azure AD-authenticated Linux servers; (4) Energy sector (ARAMCO and subsidiaries) using Azure AD for operational technology access; (5) Telecommunications (STC, Mobily) managing network infrastructure authentication. Local privilege escalation could enable attackers to compromise entire Linux server fleets, bypass SAMA security controls, and access classified government data.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare Energy and Utilities Telecommunications Defense and Security Education
⚖️ Saudi Risk Score (AI)
8.4
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Linux systems running Azure AD SSH Login Extension across your infrastructure
2. Restrict local access to affected systems to authorized personnel only
3. Enable enhanced logging and monitoring for SSH authentication attempts
4. Review recent SSH access logs for suspicious privilege escalation activities

PATCHING GUIDANCE:
1. Apply the latest Azure AD SSH Login Extension patch immediately from Microsoft Update
2. Test patches in non-production environments first
3. Prioritize patching for systems with internet-facing access or handling sensitive data
4. Verify patch installation: check extension version in Azure portal and on local systems

COMPENSATING CONTROLS (if immediate patching delayed):
1. Implement strict sudo access controls and disable unnecessary sudo privileges
2. Deploy AppArmor or SELinux profiles to restrict SSH extension capabilities
3. Use Azure Policy to enforce MFA for all Azure AD SSH authentication
4. Implement network segmentation to limit lateral movement from compromised systems

DETECTION RULES:
1. Monitor for unauthorized sudo/privilege escalation attempts in /var/log/auth.log
2. Alert on unexpected modifications to SSH extension configuration files
3. Track failed authentication attempts followed by successful privilege escalation
4. Monitor for suspicious environment variable modifications in SSH sessions
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أنظمة Linux التي تقوم بتشغيل امتداد تسجيل الدخول عبر SSH في Azure AD عبر البنية التحتية الخاصة بك
2. تقييد الوصول المحلي إلى الأنظمة المتأثرة للموظفين المصرح لهم فقط
3. تفعيل السجلات المحسنة والمراقبة لمحاولات مصادقة SSH
4. مراجعة سجلات وصول SSH الأخيرة للأنشطة المريبة لرفع الامتيازات

إرشادات التصحيح:
1. تطبيق أحدث تصحيح لامتداد تسجيل الدخول عبر SSH في Azure AD فوراً من Microsoft Update
2. اختبار التصحيحات في بيئات غير الإنتاج أولاً
3. إعطاء الأولوية لتصحيح الأنظمة ذات الوصول المواجه للإنترنت أو التعامل مع البيانات الحساسة
4. التحقق من تثبيت التصحيح: تحقق من إصدار الامتداد في مدخل Azure والأنظمة المحلية

الضوابط البديلة (إذا تأخر التصحيح الفوري):
1. تنفيذ ضوابط وصول sudo صارمة وتعطيل امتيازات sudo غير الضرورية
2. نشر ملفات تعريف AppArmor أو SELinux لتقييد قدرات امتداد SSH
3. استخدام Azure Policy لفرض المصادقة متعددة العوامل لجميع مصادقات SSH في Azure AD
4. تنفيذ تقسيم الشبكة لتحديد الحركة الجانبية من الأنظمة المخترقة

قواعد الكشف:
1. مراقبة محاولات sudo غير المصرح بها/رفع الامتيازات في /var/log/auth.log
2. التنبيه على التعديلات غير المتوقعة على ملفات تكوين امتداد SSH
3. تتبع محاولات المصادقة الفاشلة متبوعة برفع امتيازات ناجح
4. مراقبة التعديلات المريبة على متغيرات البيئة في جلسات SSH
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policy ECC 2024 A.5.2.1 - User Registration and De-registration ECC 2024 A.5.3.1 - Access Rights Review ECC 2024 A.9.2.1 - User Access Management ECC 2024 A.9.4.3 - Password Management ECC 2024 A.14.2.1 - Secure Development Policy
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Asset Management SAMA CSF PR.AC-1 - Access Control SAMA CSF PR.AC-4 - Access Rights Management SAMA CSF DE.CM-1 - Detection Processes SAMA CSF RS.MI-1 - Incident Response
🟡 ISO 27001:2022
ISO 27001:2022 A.5.15 - Access Control ISO 27001:2022 A.5.16 - Authentication ISO 27001:2022 A.5.18 - Management of Privileged Access Rights ISO 27001:2022 A.8.3 - Cryptography ISO 27001:2022 A.8.22 - Monitoring
🟣 PCI DSS v4.0.1
PCI DSS 2.1 - Change default passwords PCI DSS 7.1 - Limit access to system components PCI DSS 8.1 - Assign unique ID to each user PCI DSS 8.2 - Ensure proper user authentication
📦 Affected Products / CPE 1 entries
microsoft:azure_ad_ssh_login_extension_for_linux
📊 CVSS Score
8.1
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack VectorL — Low / Local
Attack ComplexityH — High
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeC — Changed
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.1
CWECWE-454
Exploit No
Patch ✓ Yes
Published 2026-03-10
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
8.4
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-454
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