📄 Description (English)
An out-of-bounds write vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify or corrupt memory.
We have already fixed the vulnerability in the following version:
Qsync Central 5.0.0.4 ( 2026/01/20 ) and later
🤖 AI Executive Summary
CVE-2025-30276 is a high-severity out-of-bounds write vulnerability in QNAP Qsync Central that allows authenticated remote attackers to corrupt or modify memory. With a CVSS score of 8.8, this vulnerability poses significant risk to organizations using Qsync Central for file synchronization and sharing. A patch is available in version 5.0.0.4 and later, released on January 20, 2026.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 04:05
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations in government, healthcare, and financial sectors using QNAP Qsync Central for document management and file synchronization are at risk. Government entities under NCA oversight, ARAMCO and energy sector companies, banking institutions regulated by SAMA, and healthcare providers are particularly vulnerable. The vulnerability requires valid user credentials, making insider threats and compromised accounts significant concerns. Memory corruption could lead to system crashes, data loss, or potential privilege escalation.
🏢 Affected Saudi Sectors
Government
Banking and Financial Services
Healthcare
Energy and Utilities
Telecommunications
Education
Manufacturing
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
1. IMMEDIATE ACTIONS:
- Identify all instances of Qsync Central in your environment and document current versions
- Review access logs for suspicious authentication attempts or unusual file access patterns
- Restrict network access to Qsync Central to trusted internal networks only
- Enforce strong password policies and multi-factor authentication for all Qsync Central user accounts
2. PATCHING GUIDANCE:
- Upgrade all Qsync Central installations to version 5.0.0.4 or later immediately
- Test patches in a non-production environment first
- Schedule patching during maintenance windows with minimal business impact
- Verify successful patch installation by checking version numbers post-upgrade
3. COMPENSATING CONTROLS (if immediate patching not possible):
- Implement network segmentation to isolate Qsync Central servers
- Deploy Web Application Firewall (WAF) rules to monitor for exploitation attempts
- Enable comprehensive audit logging for all Qsync Central activities
- Monitor system memory and process behavior for anomalies
4. DETECTION RULES:
- Alert on failed authentication attempts followed by successful logins from same source
- Monitor for unusual memory allocation patterns or process crashes
- Track file modifications in Qsync Central repositories for unauthorized changes
- Log and alert on any version downgrades or rollbacks
🔧 خطوات المعالجة (العربية)
1. الإجراءات الفورية:
- تحديد جميع حالات Qsync Central في بيئتك وتوثيق الإصدارات الحالية
- مراجعة سجلات الوصول للبحث عن محاولات مصادقة مريبة أو أنماط وصول ملفات غير عادية
- تقييد الوصول إلى الشبكة إلى Qsync Central للشبكات الداخلية الموثوقة فقط
- فرض سياسات كلمات مرور قوية والمصادقة متعددة العوامل لجميع حسابات مستخدمي Qsync Central
2. إرشادات التصحيح:
- ترقية جميع تثبيتات Qsync Central إلى الإصدار 5.0.0.4 أو أحدث على الفور
- اختبار التصحيحات في بيئة غير إنتاجية أولاً
- جدولة التصحيح خلال نوافذ الصيانة بأقل تأثير على الأعمال
- التحقق من نجاح تثبيت التصحيح بفحص أرقام الإصدارات بعد الترقية
3. الضوابط البديلة (إذا لم يكن التصحيح الفوري ممكناً):
- تنفيذ تقسيم الشبكة لعزل خوادم Qsync Central
- نشر قواعد جدار حماية تطبيقات الويب لمراقبة محاولات الاستغلال
- تفعيل تسجيل التدقيق الشامل لجميع أنشطة Qsync Central
- مراقبة تخصيص الذاكرة وسلوك العملية للكشف عن الشذوذ
4. قواعد الكشف:
- تنبيهات محاولات المصادقة الفاشلة متبوعة بعمليات تسجيل دخول ناجحة من نفس المصدر
- مراقبة أنماط تخصيص الذاكرة غير العادية أو أعطال العملية
- تتبع تعديلات الملفات في مستودعات Qsync Central للتغييرات غير المصرح بها
- تسجيل والتنبيه على أي تنزيلات إصدارات أو استرجاعات
📋 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.8.2.1 - Classification of information
A.8.2.3 - Handling of assets
A.12.2.1 - Controls against malware
A.12.4.1 - Event logging
A.12.4.3 - Administrator and operator logs
A.13.1.1 - Network security perimeter
A.14.2.1 - Secure development policy
🔵 SAMA CSF
Governance - Risk Management Framework
Governance - Third-party Risk Management
Protection - Access Control and Authentication
Protection - Data Protection and Privacy
Detection - Security Monitoring and Logging
Response - Incident Management
🟡 ISO 27001:2022
5.1 - Policies for information security
6.1 - Information security roles and responsibilities
6.5 - Access control
7.1 - Cryptography
8.1 - Information security in supplier relationships
8.2 - Information security requirements in supplier relationships
8.3 - ICT supply chain security
8.4 - Information security incident management
8.5 - Business continuity management
A.5.1.1 - Policies for information security
A.6.1.1 - Access control policy
A.8.1.1 - Asset inventory
A.12.4.1 - Event logging
A.14.2.1 - Secure development policy
🟣 PCI DSS v4.0
Requirement 1 - Install and maintain a firewall configuration
Requirement 2 - Do not use vendor-supplied defaults
Requirement 6 - Develop and maintain secure systems and applications
Requirement 7 - Restrict access to data by business need to know
Requirement 8 - Identify and authenticate access to system components
Requirement 10 - Track and monitor all access to network resources
🔗 References & Sources 1
📦 Affected Products / CPE 1 entries
qnap:qsync_central