📄 Description (English)
A vulnerability has been found in D-Link DI-8100 16.07.26A1. Affected by this issue is the function file_exten_asp of the file file_exten.asp of the component File Extension Handler. The manipulation of the argument Name leads to buffer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.
🤖 AI Executive Summary
A buffer overflow vulnerability exists in D-Link DI-8100 firmware version 16.07.26A1 affecting the file extension handler component. The vulnerability can be remotely exploited without authentication through manipulation of the Name parameter, allowing potential remote code execution. With a CVSS score of 7.2 and publicly disclosed exploit code, this poses an immediate threat to organizations using this networking equipment.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 7, 2026 22:26
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi telecommunications providers (STC, Mobily, Zain) and government agencies (NCA, CITC) that deploy D-Link DI-8100 routers for network infrastructure. Banking sector organizations using these devices for branch connectivity face risk of unauthorized access to financial networks. Energy sector (ARAMCO, SEC) and healthcare institutions relying on this equipment for network segmentation are at elevated risk. The lack of available patches creates persistent vulnerability exposure across critical infrastructure.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Government (NCA, CITC)
Banking and Financial Services
Energy (ARAMCO, SEC)
Healthcare
Education
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.1
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all D-Link DI-8100 devices running firmware 16.07.26A1 in your network using network scanning tools
2. Isolate affected devices from critical network segments and internet-facing positions
3. Implement network-level access controls restricting access to the device management interface (typically port 80/443)
4. Enable logging and monitoring on affected devices for suspicious file extension handler requests
PATCHING GUIDANCE:
1. Check D-Link support portal for firmware updates beyond 16.07.26A1
2. If no patch is available, contact D-Link support for security advisory and timeline
3. Plan device replacement with alternative vendors if patches remain unavailable
COMPENSATING CONTROLS:
1. Deploy Web Application Firewall (WAF) rules to block malicious Name parameter payloads
2. Implement network segmentation isolating device management traffic
3. Use VPN/jump hosts for all administrative access to affected devices
4. Deploy intrusion detection signatures for buffer overflow attempts targeting file_exten.asp
DETECTION RULES:
1. Monitor HTTP POST requests to /file_exten.asp with oversized Name parameters (>256 bytes)
2. Alert on any successful file_exten.asp access from non-administrative IP ranges
3. Track firmware version via SNMP/HTTP headers to identify vulnerable instances
4. Monitor for unusual process execution or system crashes on affected devices
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة D-Link DI-8100 التي تعمل بالإصدار 16.07.26A1 في شبكتك باستخدام أدوات المسح
2. عزل الأجهزة المتأثرة عن أجزاء الشبكة الحرجة والمواضع المواجهة للإنترنت
3. تطبيق عناصر تحكم الوصول على مستوى الشبكة تقيد الوصول إلى واجهة إدارة الجهاز
4. تفعيل السجلات والمراقبة على الأجهزة المتأثرة للطلبات المريبة
إرشادات التصحيح:
1. التحقق من بوابة دعم D-Link للحصول على تحديثات البرنامج الثابت
2. إذا لم يكن هناك تصحيح متاح، اتصل بدعم D-Link للحصول على مشورة أمنية
3. التخطيط لاستبدال الجهاز بموردين بدلاء إذا ظلت التصحيحات غير متاحة
عناصر التحكم التعويضية:
1. نشر قواعد جدار حماية تطبيقات الويب لحجب حمولات معاملات الاسم الضارة
2. تطبيق تقسيم الشبكة لعزل حركة إدارة الجهاز
3. استخدام VPN/أجهزة القفز للوصول الإداري إلى الأجهزة المتأثرة
4. نشر توقيعات كشف الاختراق لمحاولات تجاوز المخزن المؤقت
📋 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 of network access
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification
PR.IP-12 - Security patch management
DE.CM-1 - Detection and monitoring of network anomalies
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development and change management
A.12.4.1 - Event logging and monitoring
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches and updates
Requirement 11.2 - Vulnerability scanning
🔗 References & Sources 5
🔗
https://github.com/draw-ctf/report/blob/main/DI-8100/file_exten_asp_overflow.md
cna@vuldb.com
Exploit
Third Party Advisory
🔗
https://vuldb.com/submit/802868
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/359856
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/359856/cti
cna@vuldb.com
Permissions Required
VDB Entry
🔗
https://www.dlink.com/
cna@vuldb.com
Product
📦 Affected Products / CPE 1 entries
dlink:di-8100_firmware:16.07.26a1