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Vulnerabilities

CVE-2026-0837

High ⚡ Exploit Available
UTT 520W Router Buffer Overflow Vulnerability in Firewall Configuration (CVE-2026-0837)
CWE-119 — Weakness Type
Published: Jan 11, 2026  ·  Modified: Feb 28, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A vulnerability was identified in UTT 进取 520W 1.7.7-180627. This affects the function strcpy of the file /goform/formFireWall. Such manipulation of the argument GroupName leads to buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

🤖 AI Executive Summary

A critical buffer overflow vulnerability (CVE-2026-0837) exists in UTT 520W router firmware version 1.7.7-180627, affecting the strcpy function in the firewall configuration module. The vulnerability allows remote attackers to execute arbitrary code by manipulating the GroupName parameter, with public exploits available and no vendor patch released despite early notification.

📄 Description (Arabic)

تتيح هذه الثغرة الأمنية للمهاجمين استغلال خلل في معالجة البيانات ضمن وظيفة strcpy في ملف /goform/formFireWall الخاص بإعدادات جدار الحماية. يمكن للمهاجم إرسال بيانات ضارة عبر معامل GroupName تتجاوز حدود المخزن المؤقت المخصص، مما يؤدي إلى الكتابة فوق مناطق الذاكرة الحساسة وتنفيذ أوامر برمجية خبيثة عن بُعد. تكمن خطورة الثغرة في توفر استغلالات عامة جاهزة للاستخدام وعدم استجابة الشركة المصنعة لإصدار تحديث أمني، مما يترك الأجهزة المتأثرة عرضة للاختراق الكامل والسيطرة على البنية التحتية للشبكة.

🤖 ملخص تنفيذي (AI)

توجد ثغرة حرجة لتجاوز سعة المخزن المؤقت (CVE-2026-0837) في البرنامج الثابت لجهاز التوجيه UTT 520W الإصدار 1.7.7-180627، تؤثر على دالة strcpy في وحدة إعدادات جدار الحماية. تسمح الثغرة للمهاجمين عن بُعد بتنفيذ أوامر برمجية عشوائية من خلال التلاعب بمعامل GroupName، مع توفر استغلالات عامة وعدم إصدار المورّد لأي تحديث أمني رغم الإخطار المبكر.

🤖 AI Intelligence Analysis Analyzed: Feb 28, 2026 08:17
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using UTT 520W routers face immediate risk of network compromise, as attackers can remotely gain full control of network infrastructure through publicly available exploits. This is particularly critical for SMEs and branch offices that commonly deploy such devices without adequate security monitoring, potentially exposing sensitive data and violating PDPL requirements.
🏢 Affected Saudi Sectors
القطاع المالي والمصرفي المنشآت الصغيرة والمتوسطة قطاع التعليم قطاع الرعاية الصحية القطاع الحكومي قطاع الاتصالات وتقنية المعلومات قطاع التجزئة والتجارة الإلكترونية
⚖️ Saudi Risk Score (AI)
9.0
/ 10.0
🔧 Remediation Steps (English)
1. Immediately isolate or disconnect all UTT 520W routers (firmware 1.7.7-180627) from production networks and implement network segmentation to limit potential lateral movement until replacement devices are deployed
2. Deploy alternative enterprise-grade routing equipment from vendors with active security support programs, ensuring new devices meet NCA ECC cybersecurity controls and SAMA CSF requirements for network security devices
3. Implement compensating controls including strict firewall rules limiting administrative access to trusted IP addresses only, enable comprehensive logging and monitoring for all network devices, and conduct immediate security assessments of any networks previously protected by affected devices
🔧 خطوات المعالجة (العربية)
1. عزل أو فصل جميع أجهزة التوجيه UTT 520W (البرنامج الثابت 1.7.7-180627) فوراً من شبكات الإنتاج وتطبيق تجزئة الشبكة للحد من الحركة الجانبية المحتملة حتى يتم نشر أجهزة بديلة
2. نشر معدات توجيه بديلة من مستوى المؤسسات من موردين لديهم برامج دعم أمني نشطة، مع التأكد من أن الأجهزة الجديدة تلبي ضوابط الأمن السيبراني للمركز الوطني للأمن السيبراني ومتطلبات إطار الأمن السيبراني لمؤسسة النقد العربي السعودي لأجهزة أمن الشبكات
3. تطبيق ضوابط تعويضية تشمل قواعد جدار حماية صارمة تحد من الوصول الإداري لعناوين IP الموثوقة فقط، وتفعيل التسجيل والمراقبة الشاملة لجميع أجهزة الشبكة، وإجراء تقييمات أمنية فورية لأي شبكات كانت محمية سابقاً بالأجهزة المتأثرة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
NCA-ECC-1-1: Network Security Controls NCA-ECC-2-1: Vulnerability Management NCA-ECC-3-2: Security Monitoring and Logging NCA-ECC-5-1: Third-Party Risk Management
🔵 SAMA CSF
SAMA-CSF-CCC-5.1: Network Security Management SAMA-CSF-TVM-1.1: Vulnerability Assessment SAMA-CSF-TVM-2.1: Patch Management SAMA-CSF-ORM-4.1: Third-Party Risk Assessment
🟡 ISO 27001:2022
A.12.6.1: Management of Technical Vulnerabilities A.13.1.1: Network Controls A.14.2.5: Secure System Engineering Principles A.15.1.2: Addressing Security in Supplier Agreements
📦 Affected Products / CPE 1 entries
utt:520w_firmware
📊 CVSS Score
8.8
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorN — None / Network
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 Score8.8
CWECWE-119
EPSS0.13%
Exploit ✓ Yes
Patch ✓ Yes
Published 2026-01-11
Source Feed nvd
Views 2
🇸🇦 Saudi Risk Score
9.0
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
exploit-available CWE-119
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