📄 Description (English)
A vulnerability has been found in UTT 进取 520W 1.7.7-180627. This vulnerability affects the function strcpy of the file /goform/ConfigExceptMSN. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may 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-2026-1139) exists in UTT 520W firmware versions up to 1.7.7-180627, affecting the /goform/ConfigExceptMSN endpoint. The vulnerability allows remote unauthenticated attackers to execute arbitrary code with device privileges. With CVSS 8.8 and publicly disclosed exploits available, this poses an immediate threat to network infrastructure in Saudi Arabia.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 10:26
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability critically impacts Saudi telecommunications infrastructure (STC, Mobily, Zain), government networks (NCA, CITC), and enterprise networks using UTT 520W devices as network appliances or gateways. Banking sector (SAMA-regulated institutions) faces risk if these devices are deployed in payment processing networks. Energy sector (ARAMCO, SEC) and healthcare institutions using these devices for network management are also at significant risk. The remote, unauthenticated nature of the exploit makes this particularly dangerous for organizations with internet-facing UTT devices.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Government (NCA, CITC)
Banking (SAMA-regulated institutions)
Energy (ARAMCO, SEC)
Healthcare
Enterprise Networks
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all UTT 520W devices in your network using network scanning tools (Shodan, Censys, or internal asset inventory)
2. Isolate affected devices from internet-facing networks immediately
3. Implement network segmentation to restrict access to /goform/ConfigExceptMSN endpoint
4. Enable firewall rules to block unauthorized access to management interfaces
PATCHING:
1. Contact UTT vendor for available firmware patches beyond version 1.7.7-180627
2. Test patches in isolated lab environment before production deployment
3. Schedule maintenance windows for firmware updates on all affected devices
4. Maintain device backups before patching
COMPENSATING CONTROLS (if patch unavailable):
1. Deploy Web Application Firewall (WAF) rules to detect/block strcpy buffer overflow patterns
2. Implement strict input validation at network perimeter
3. Use IDS/IPS signatures to detect exploitation attempts
4. Restrict administrative access to device management interfaces via VPN only
5. Disable remote management if not required
DETECTION:
1. Monitor for HTTP POST requests to /goform/ConfigExceptMSN with abnormally long payloads
2. Alert on any successful code execution attempts on UTT devices
3. Track firmware version changes on all UTT devices
4. Monitor for unusual process execution originating from network appliances
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة UTT 520W في شبكتك باستخدام أدوات المسح (Shodan أو Censys أو جرد الأصول الداخلي)
2. عزل الأجهزة المتأثرة عن الشبكات المتصلة بالإنترنت فورًا
3. تنفيذ تقسيم الشبكة لتقييد الوصول إلى نقطة النهاية /goform/ConfigExceptMSN
4. تفعيل قواعد جدار الحماية لحظر الوصول غير المصرح إلى واجهات الإدارة
التصحيح:
1. الاتصال بمورد UTT للحصول على تحديثات البرامج الثابتة المتاحة بعد الإصدار 1.7.7-180627
2. اختبار التصحيحات في بيئة معزولة قبل النشر في الإنتاج
3. جدولة نوافذ الصيانة لتحديثات البرامج الثابتة على جميع الأجهزة المتأثرة
4. الاحتفاظ بنسخ احتياطية من الأجهزة قبل التصحيح
الضوابط البديلة (إذا لم يكن التصحيح متاحًا):
1. نشر قواعد جدار تطبيقات الويب (WAF) للكشف عن أنماط تجاوز المخزن المؤقت
2. تنفيذ التحقق الصارم من صحة المدخلات على محيط الشبكة
3. استخدام توقيعات IDS/IPS للكشف عن محاولات الاستغلال
4. تقييد الوصول الإداري إلى واجهات إدارة الأجهزة عبر VPN فقط
5. تعطيل الإدارة البعيدة إذا لم تكن مطلوبة
الكشف:
1. مراقبة طلبات HTTP POST إلى /goform/ConfigExceptMSN بأحمال غير عادية الطول
2. التنبيه على أي محاولات تنفيذ كود ناجحة على أجهزة UTT
3. تتبع تغييرات إصدار البرامج الثابتة على جميع أجهزة UTT
4. مراقبة تنفيذ العمليات غير العادية من أجهزة الشبكة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
ECC 2024 A.14.2.1 - Secure development policy
ECC 2024 A.12.2.1 - Monitoring and logging
ECC 2024 A.13.1.3 - Segregation of networks
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification
PR.DS-6 - Data security and integrity
DE.CM-1 - Detection and monitoring
RS.RP-1 - Response planning
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy
A.12.2.1 - Monitoring
A.13.1.3 - Segregation of networks
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches and updates
Requirement 11.2 - Vulnerability scanning
Requirement 12.2 - Configuration standards
🔗 References & Sources 4
🔗
https://github.com/cymiao1978/cve/blob/main/new/34.md
cna@vuldb.com
Exploit
Third Party Advisory
🔗
https://vuldb.com/?ctiid.341730
cna@vuldb.com
Permissions Required
VDB Entry
🔗
https://vuldb.com/?id.341730
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/?submit.735299
cna@vuldb.com
Third Party Advisory
VDB Entry
📦 Affected Products / CPE 1 entries
utt:520w_firmware