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Vulnerabilities

CVE-2026-2364

High
If a legitimate user confirms a self-update prompt or initiate an installation of a CODESYS Development System, a low privileged local attacker can gain elevated rights due to a TOCTOU vulnerability i
CWE-367 — Weakness Type
Published: Mar 10, 2026  ·  Modified: Mar 17, 2026  ·  Source: NVD
CVSS v3
7.3
🔗 NVD Official
📄 Description (English)

If a legitimate user confirms a self-update prompt or initiate an installation of a CODESYS Development System, a low privileged local attacker can gain elevated rights due to a TOCTOU vulnerability in the CODESYS installer.

🤖 AI Executive Summary

CVE-2026-2364 is a Time-of-Check-Time-of-Use (TOCTOU) vulnerability in CODESYS Development System installer that allows low-privileged local attackers to escalate privileges during legitimate software updates or installations. With a CVSS score of 7.3, this vulnerability poses a significant risk to organizations using CODESYS for industrial control systems and automation. The attack requires user interaction but can result in complete system compromise with elevated privileges.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 5, 2026 16:49
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi organizations in critical sectors: (1) Energy & Utilities (ARAMCO, regional power companies) using CODESYS for SCADA/ICS systems; (2) Manufacturing & Industrial facilities relying on CODESYS for automation and control systems; (3) Water & Wastewater utilities managing critical infrastructure; (4) Telecommunications infrastructure using industrial automation. The privilege escalation capability poses severe risks to operational technology (OT) environments where CODESYS is deployed for critical process control.
🏢 Affected Saudi Sectors
Energy & Utilities (ARAMCO, regional power companies) Manufacturing & Industrial Automation Water & Wastewater Management Telecommunications Infrastructure Chemical & Petrochemical Processing Building Automation & Smart Cities
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all systems running CODESYS Development System across your organization, particularly in OT/ICS environments
2. Restrict local access to systems running CODESYS to authorized personnel only
3. Implement principle of least privilege - ensure users do not run with administrative rights unnecessarily
4. Monitor for suspicious privilege escalation attempts on systems with CODESYS installed

Patching Guidance:
1. Apply the latest CODESYS Development System patch immediately when available from the vendor
2. Schedule updates during maintenance windows to minimize operational disruption
3. Test patches in non-production environments first, especially for critical OT systems
4. Prioritize patching for systems in critical infrastructure (energy, water, utilities)

Compensating Controls (if patch unavailable):
1. Implement file integrity monitoring on CODESYS installation directories
2. Use application whitelisting to prevent unauthorized executable execution during updates
3. Disable auto-update functionality and require manual, supervised updates only
4. Implement strict access controls on installer files and update mechanisms
5. Use AppLocker or similar tools to restrict execution of CODESYS processes

Detection Rules:
1. Monitor for unexpected privilege escalation events on systems with CODESYS
2. Alert on suspicious file modifications in CODESYS installation directories during update operations
3. Track process creation with elevated privileges spawned from CODESYS installer processes
4. Monitor for race conditions in temporary file creation during CODESYS installation
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تقوم بتشغيل نظام CODESYS Development System عبر المنظمة، خاصة في بيئات OT/ICS
2. تقييد الوصول المحلي إلى الأنظمة التي تقوم بتشغيل CODESYS للموظفين المصرح لهم فقط
3. تطبيق مبدأ أقل امتياز - تأكد من عدم تشغيل المستخدمين بحقوق إدارية غير ضرورية
4. مراقبة محاولات تصعيد الامتيازات المريبة على الأنظمة التي تحتوي على CODESYS

إرشادات التصحيح:
1. تطبيق أحدث تصحيح نظام CODESYS Development System فوراً عند توفره من البائع
2. جدولة التحديثات خلال نوافذ الصيانة لتقليل التأثير التشغيلي
3. اختبار التصحيحات في بيئات غير الإنتاج أولاً، خاصة للأنظمة الحرجة في OT
4. إعطاء الأولوية لتصحيح الأنظمة في البنية التحتية الحرجة (الطاقة والمياه والمرافق)

الضوابط البديلة (إذا لم يكن التصحيح متاحاً):
1. تطبيق مراقبة سلامة الملفات على دلائل تثبيت CODESYS
2. استخدام القائمة البيضاء للتطبيقات لمنع تنفيذ الملفات القابلة للتنفيذ غير المصرح بها أثناء التحديثات
3. تعطيل وظيفة التحديث التلقائي وطلب التحديثات اليدوية المراقبة فقط
4. تطبيق ضوابط وصول صارمة على ملفات المثبت وآليات التحديث
5. استخدام AppLocker أو أدوات مماثلة لتقييد تنفيذ عمليات CODESYS

قواعد الكشف:
1. مراقبة أحداث تصعيد الامتيازات غير المتوقعة على الأنظمة التي تحتوي على CODESYS
2. التنبيه على تعديلات الملفات المريبة في دلائل تثبيت CODESYS أثناء عمليات التحديث
3. تتبع إنشاء العمليات بامتيازات مرتفعة التي تم إطلاقها من عمليات مثبت CODESYS
4. مراقبة حالات تنافس الملفات المؤقتة أثناء تثبيت CODESYS
📋 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 access rights management A.8.2.1 - Classification of information A.12.2.1 - Restrictions on software installation A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
ID.AM-2 - Software inventory and management PR.AC-1 - Access control policy and procedures PR.AC-4 - Access rights and privileges management PR.PT-1 - Security awareness and training DE.CM-8 - Vulnerability scanning and management RS.MI-2 - Incident response and recovery procedures
🟡 ISO 27001:2022
A.5.1.1 - Information security policies A.6.1.1 - Access control policy A.6.2.1 - User access management A.8.1.1 - Asset inventory A.12.2.1 - Restrictions on software installation A.12.6.1 - Management of technical vulnerabilities
📊 CVSS Score
7.3
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.3
CWECWE-367
Exploit No
Patch ✓ Yes
Published 2026-03-10
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
7.8
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-367
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