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Vulnerabilities

CVE-2026-25166

High
Deserialization of untrusted data in Windows System Image Manager allows an authorized attacker to execute code locally.
CWE-502 — Weakness Type
Published: Mar 10, 2026  ·  Modified: Mar 17, 2026  ·  Source: NVD
CVSS v3
7.8
🔗 NVD Official
📄 Description (English)

Deserialization of untrusted data in Windows System Image Manager allows an authorized attacker to execute code locally.

🤖 AI Executive Summary

CVE-2026-25166 is a high-severity deserialization vulnerability in Windows System Image Manager affecting multiple Windows 10 versions. An authorized attacker can execute arbitrary code locally by exploiting unsafe deserialization of untrusted data. While no public exploit is currently available, the vulnerability poses significant risk to organizations managing Windows deployments, particularly in government and enterprise environments.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 29, 2026 04:54
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi government agencies (NCA, NCSC), military and defense organizations, and large enterprises managing Windows infrastructure. Government IT departments managing system imaging and deployment pipelines are at elevated risk. Banking sector organizations using Windows-based infrastructure for administrative functions, healthcare institutions managing medical imaging systems, and energy sector organizations (ARAMCO, SEC) face potential compromise. The vulnerability is particularly concerning for organizations managing sensitive system configurations through Windows System Image Manager.
🏢 Affected Saudi Sectors
Government and Public Administration Defense and Military Banking and Financial Services Healthcare and Medical Imaging Energy and Utilities Telecommunications Large Enterprises with Windows Infrastructure
⚖️ Saudi Risk Score (AI)
7.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running affected Windows 10 versions (1607, 1809, 21H2, 22H2) in your environment
2. Restrict access to Windows System Image Manager to authorized personnel only
3. Implement application whitelisting to control execution of System Image Manager
4. Monitor for suspicious deserialization activities in Windows event logs

PATCHING GUIDANCE:
1. Apply Microsoft security patches immediately upon availability
2. Prioritize patching for systems with administrative access or handling sensitive configurations
3. Test patches in non-production environments before enterprise deployment
4. Verify patch installation using Windows Update verification tools

COMPENSATING CONTROLS (if patch unavailable):
1. Disable Windows System Image Manager if not actively required
2. Implement file integrity monitoring on System Image Manager configuration files
3. Use AppLocker or Windows Defender Application Control to restrict execution
4. Enforce principle of least privilege for user accounts accessing imaging tools

DETECTION RULES:
1. Monitor Event ID 4688 for System Image Manager process execution with suspicious parent processes
2. Alert on .wim file modifications outside scheduled maintenance windows
3. Track registry modifications to HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System
4. Monitor for unusual network connections initiated by System Image Manager process
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تعمل بإصدارات Windows 10 المتأثرة (1607، 1809، 21H2، 22H2) في بيئتك
2. تقييد الوصول إلى أداة إدارة صور نظام Windows للموظفين المصرح لهم فقط
3. تطبيق القائمة البيضاء للتطبيقات للتحكم في تنفيذ أداة إدارة الصور
4. مراقبة أنشطة فك التسلسل المريبة في سجلات أحداث Windows

إرشادات التصحيح:
1. تطبيق تصحيحات أمان Microsoft فورًا عند توفرها
2. إعطاء الأولوية لتصحيح الأنظمة ذات الوصول الإداري أو التعامل مع التكوينات الحساسة
3. اختبار التصحيحات في بيئات غير الإنتاج قبل النشر على مستوى المؤسسة
4. التحقق من تثبيت التصحيح باستخدام أدوات التحقق من Windows Update

الضوابط البديلة (إذا لم يكن التصحيح متاحًا):
1. تعطيل أداة إدارة صور نظام Windows إذا لم تكن مطلوبة بنشاط
2. تطبيق مراقبة سلامة الملفات على ملفات تكوين أداة إدارة الصور
3. استخدام AppLocker أو Windows Defender Application Control لتقييد التنفيذ
4. فرض مبدأ أقل امتياز لحسابات المستخدمين التي تصل إلى أدوات التصوير

قواعد الكشف:
1. مراقبة معرف الحدث 4688 لتنفيذ عملية أداة إدارة صور النظام مع العمليات الأب المريبة
2. التنبيه على تعديلات ملف .wim خارج نوافذ الصيانة المجدولة
3. تتبع تعديلات السجل على HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System
4. مراقبة الاتصالات الشبكية غير العادية التي تبدأها عملية أداة إدارة صور النظام
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policies ECC 2024 A.5.2.1 - User Registration and De-registration ECC 2024 A.8.1.1 - Asset Inventory and Ownership ECC 2024 A.8.2.1 - Information Classification ECC 2024 A.12.2.1 - Change Management Procedures ECC 2024 A.12.6.1 - Management of Technical Vulnerabilities
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Asset Management SAMA CSF ID.GV-1 - Organizational Context SAMA CSF PR.AC-1 - Access Control SAMA CSF PR.PT-2 - Security Awareness and Training SAMA CSF DE.CM-8 - Vulnerability Scans SAMA CSF RS.MI-2 - Incident Response Procedures
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for Information Security ISO 27001:2022 A.6.1 - Organization of Information Security ISO 27001:2022 A.8.1 - Asset Management ISO 27001:2022 A.12.6 - Management of Technical Vulnerabilities ISO 27001:2022 A.14.2 - Development and Support Processes
📦 Affected Products / CPE 22 entries
microsoft:windows_10_1607
microsoft:windows_10_1607
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_2016
microsoft:windows_server_2019
microsoft:windows_server_2022
microsoft:windows_server_2022_23h2
📊 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-502
Exploit No
Patch ✓ Yes
Published 2026-03-10
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
7.2
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-502
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