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Vulnerabilities

CVE-2025-52869

High
A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We h
CWE-120 — Weakness Type
Published: Feb 11, 2026  ·  Modified: Feb 28, 2026  ·  Source: NVD
CVSS v3
8.1
🔗 NVD Official
📄 Description (English)

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes.

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-2025-52869 is a buffer overflow vulnerability in QNAP Qsync Central that allows authenticated remote attackers to modify memory or crash processes. With a CVSS score of 8.1, this poses a significant risk to organizations using Qsync Central for file synchronization and sharing. The vulnerability requires valid user credentials but can lead to denial of service or potential code execution. Immediate patching to version 5.0.0.4 or later is strongly recommended.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 26, 2026 02:19
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi organizations in the following sectors: (1) Government agencies and ministries using Qsync Central for secure file sharing and collaboration; (2) Banking and financial institutions leveraging QNAP solutions for data synchronization; (3) Healthcare organizations (Ministry of Health, private hospitals) storing sensitive patient data; (4) Energy sector (ARAMCO, utilities) using file synchronization for operational data; (5) Telecommunications companies (STC, Mobily) managing network infrastructure data. The authenticated nature of the attack reduces immediate risk but poses significant threat to insider threats and compromised accounts. Organizations with multi-user Qsync Central deployments face elevated risk of service disruption and data integrity compromise.
🏢 Affected Saudi Sectors
Government and Public Administration Banking and Financial Services Healthcare Energy and Utilities Telecommunications Education Manufacturing
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all Qsync Central instances in your environment and document current versions
2. Prioritize systems handling sensitive data (financial, healthcare, government records)
3. Review user access logs for suspicious authentication patterns or unusual file access
4. Implement network segmentation to restrict Qsync Central access to authorized users only

Patching Guidance:
1. Upgrade all Qsync Central installations to version 5.0.0.4 (released 2026/01/20) or later immediately
2. Test patches in non-production environments first
3. Schedule maintenance windows for production upgrades with minimal business impact
4. Verify patch installation and service functionality post-upgrade

Compensating Controls (if immediate patching not possible):
1. Implement strict access controls and multi-factor authentication (MFA) for all Qsync Central user accounts
2. Monitor and restrict network access to Qsync Central to trusted IP ranges only
3. Enable detailed audit logging for all file operations and user activities
4. Implement memory protection mechanisms (ASLR, DEP) at the OS level
5. Monitor process crashes and memory anomalies using system monitoring tools

Detection Rules:
1. Monitor for unexpected process terminations of Qsync Central services
2. Alert on unusual memory access patterns or buffer-related errors in application logs
3. Track failed authentication attempts followed by successful logins from same source
4. Monitor for file modifications in Qsync Central configuration directories
5. Implement IDS/IPS rules to detect malformed requests to Qsync Central API endpoints
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع مثيلات Qsync Central في بيئتك وقثق الإصدارات الحالية
2. أعط الأولوية للأنظمة التي تتعامل مع البيانات الحساسة (السجلات المالية والصحية والحكومية)
3. راجع سجلات الوصول للمستخدمين بحثاً عن أنماط مصادقة مريبة أو وصول ملفات غير عادي
4. طبق تقسيم الشبكة لتقييد وصول Qsync Central للمستخدمين المصرح لهم فقط

إرشادات التصحيح:
1. قم بترقية جميع تثبيتات Qsync Central إلى الإصدار 5.0.0.4 (تم الإصدار في 2026/01/20) أو أحدث فوراً
2. اختبر التصحيحات في بيئات غير الإنتاج أولاً
3. جدول نوافذ الصيانة لترقيات الإنتاج بأقل تأثير على الأعمال
4. تحقق من تثبيت التصحيح وعمل الخدمة بعد الترقية

الضوابط البديلة (إذا لم يكن التصحيح الفوري ممكناً):
1. طبق ضوابط وصول صارمة والمصادقة متعددة العوامل (MFA) لجميع حسابات مستخدمي Qsync Central
2. راقب وقيد الوصول إلى الشبكة لـ Qsync Central على نطاقات IP موثوقة فقط
3. فعّل تسجيل التدقيق التفصيلي لجميع عمليات الملفات وأنشطة المستخدمين
4. طبق آليات حماية الذاكرة (ASLR, DEP) على مستوى نظام التشغيل
5. راقب توقف العمليات والشذوذ في الذاكرة باستخدام أدوات المراقبة

قواعد الكشف:
1. راقب إنهاء العمليات غير المتوقعة لخدمات Qsync Central
2. أصدر تنبيهات عند أنماط وصول الذاكرة غير العادية أو أخطاء متعلقة بالمخزن المؤقت في سجلات التطبيق
3. تتبع محاولات المصادقة الفاشلة متبوعة بعمليات تسجيل دخول ناجحة من نفس المصدر
4. راقب تعديلات الملفات في دلائل تكوين Qsync Central
5. طبق قواعس IDS/IPS للكشف عن الطلبات المشوهة لنقاط نهاية API الخاصة بـ Qsync Central
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures A.6.1.1 - Organization of Information Security A.12.2.1 - Restrictions on Software Installation A.12.6.1 - Management of Technical Vulnerabilities A.14.2.1 - Secure Development Policy
🔵 SAMA CSF
ID.RA-1 - Asset Management and Inventory PR.IP-12 - Software Development and Quality Assurance DE.CM-8 - Vulnerability Scans RS.MI-2 - Incident Response and Recovery
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy and procedures A.12.2.1 - Restrictions on software installation A.12.3.1 - Information and communication technology (ICT) asset management
🟣 PCI DSS v4.0.1
6.2 - Ensure all system components and software are protected from known vulnerabilities 6.3.1 - Identify and implement security patches for all software components 11.2 - Run automated vulnerability scanning tools regularly
📦 Affected Products / CPE 1 entries
qnap:qsync_central
📊 CVSS Score
8.1
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.1
CWECWE-120
EPSS0.11%
Exploit No
Patch ✓ Yes
Published 2026-02-11
Source Feed nvd
Views 6
🇸🇦 Saudi Risk Score
7.8
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-120
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