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Global ransomware Multiple sectors CRITICAL 15m Global supply_chain Software Development, IT Infrastructure, Technology CRITICAL 1h Global vulnerability,data_breach,general Technology, Industrial Control Systems, Telecommunications HIGH 1h Global general Consumer Electronics and Retail MEDIUM 4h Global supply_chain Software Development and Technology HIGH 4h Global general Artificial Intelligence and Software Development LOW 5h Global general Artificial Intelligence and Cybersecurity MEDIUM 5h Global malware Software Development / Technology HIGH 6h Global vulnerability Information Technology HIGH 6h Global data_breach Water Utilities / Critical Infrastructure HIGH 6h Global ransomware Multiple sectors CRITICAL 15m Global supply_chain Software Development, IT Infrastructure, Technology CRITICAL 1h Global vulnerability,data_breach,general Technology, Industrial Control Systems, Telecommunications HIGH 1h Global general Consumer Electronics and Retail MEDIUM 4h Global supply_chain Software Development and Technology HIGH 4h Global general Artificial Intelligence and Software Development LOW 5h Global general Artificial Intelligence and Cybersecurity MEDIUM 5h Global malware Software Development / Technology HIGH 6h Global vulnerability Information Technology HIGH 6h Global data_breach Water Utilities / Critical Infrastructure HIGH 6h Global ransomware Multiple sectors CRITICAL 15m Global supply_chain Software Development, IT Infrastructure, Technology CRITICAL 1h Global vulnerability,data_breach,general Technology, Industrial Control Systems, Telecommunications HIGH 1h Global general Consumer Electronics and Retail MEDIUM 4h Global supply_chain Software Development and Technology HIGH 4h Global general Artificial Intelligence and Software Development LOW 5h Global general Artificial Intelligence and Cybersecurity MEDIUM 5h Global malware Software Development / Technology HIGH 6h Global vulnerability Information Technology HIGH 6h Global data_breach Water Utilities / Critical Infrastructure HIGH 6h
Vulnerabilities

CVE-2026-7857

High ⚡ Exploit Available
CWE-119 — Weakness Type
Published: May 5, 2026  ·  Modified: May 12, 2026  ·  Source: NVD
CVSS v3
7.2
🔗 NVD Official
📄 Description (English)

A vulnerability has been found in D-Link DI-8100 16.07.26A1. This vulnerability affects the function sprintf of the file /user_group.asp of the component CGI Handler. The manipulation leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

🤖 AI Executive Summary

A critical buffer overflow vulnerability exists in D-Link DI-8100 firmware version 16.07.26A1 affecting the CGI handler's sprintf function in /user_group.asp. The vulnerability can be exploited remotely without authentication, allowing attackers to execute arbitrary code or cause denial of service. With public exploit availability and no patch currently available, this poses an immediate threat to organizations using this networking equipment.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 10, 2026 09:17
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability directly impacts Saudi telecommunications infrastructure (STC, Mobily, Zain), government networks (NCA, CITC), and banking institutions using D-Link DI-8100 devices for network segmentation and access control. The remote code execution capability poses severe risk to critical infrastructure, particularly in ARAMCO facilities and SAMA-regulated financial networks. Healthcare institutions and educational organizations using these devices for network management are also at significant risk of compromise.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain) Banking and Financial Services (SAMA-regulated) Government and Defense (NCA, CITC) Energy (ARAMCO, utilities) Healthcare Education Critical Infrastructure
⚖️ Saudi Risk Score (AI)
8.7
/ 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 if possible
3. Implement network-level access controls to restrict access to /user_group.asp endpoint
4. Monitor for suspicious CGI requests and buffer overflow attempts

COMPENSATING CONTROLS (until patch available):
5. Deploy Web Application Firewall (WAF) rules to block requests to /user_group.asp with suspicious sprintf patterns
6. Implement strict input validation at network perimeter
7. Disable remote management features if not essential
8. Restrict administrative access to device management interfaces
9. Enable detailed logging of all CGI handler activities

DETECTION RULES:
- Monitor for HTTP requests containing large payloads to /user_group.asp
- Alert on sprintf function calls with unbounded input parameters
- Track failed authentication attempts followed by CGI exploitation attempts
- Monitor for unexpected process execution from web server processes

PATCHING:
10. Contact D-Link support for firmware updates or security advisories
11. Prepare for emergency firmware upgrade once patch is released
12. Consider device replacement if vendor support is unavailable
🔧 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 القطاعات الحرجة في الشبكة إن أمكن
3. تطبيق عناصر تحكم الوصول على مستوى الشبكة لتقييد الوصول إلى نقطة نهاية /user_group.asp
4. مراقبة طلبات CGI المريبة ومحاولات تجاوز المخزن المؤقت

عناصر التحكم التعويضية (حتى توفر التصحيح):
5. نشر قواعد جدار حماية تطبيقات الويب لحجب الطلبات إلى /user_group.asp بأنماط sprintf مريبة
6. تطبيق التحقق الصارم من صحة الإدخال على محيط الشبكة
7. تعطيل ميزات الإدارة عن بعد إذا لم تكن ضرورية
8. تقييد الوصول الإداري إلى واجهات إدارة الأجهزة
9. تفعيل التسجيل التفصيلي لجميع أنشطة معالج CGI

قواعد الكشف:
- مراقبة طلبات HTTP التي تحتوي على حمولات كبيرة إلى /user_group.asp
- تنبيهات استدعاءات دالة sprintf بمعاملات إدخال غير محدودة
- تتبع محاولات المصادقة الفاشلة متبوعة بمحاولات استغلال CGI
- مراقبة تنفيذ العمليات غير المتوقعة من عمليات خادم الويب

التصحيح:
10. التواصل مع دعم D-Link للحصول على تحديثات البرنامج الثابت أو التنبيهات الأمنية
11. الاستعداد لترقية البرنامج الثابت الطارئة بمجرد إصدار التصحيح
12. النظر في استبدال الجهاز إذا كان دعم البائع غير متاح
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy A.12.3.1 - Event logging A.13.1.1 - Network security perimeter
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification PR.DS-6 - Data security and integrity DE.CM-1 - Detection and analysis RS.RP-1 - Response planning
🟡 ISO 27001:2022
A.12.2.1 - Change management procedures A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development and change management A.13.1.1 - Network security perimeter
🟣 PCI DSS v4.0.1
6.2 - Security patches and updates 11.2 - Vulnerability scanning 6.5.1 - Injection flaws
📦 Affected Products / CPE 1 entries
dlink:di-8100_firmware:16.07.26a1
📊 CVSS Score
7.2
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredH — High
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.2
CWECWE-119
EPSS0.06%
Exploit ✓ Yes
Patch ✗ No
Published 2026-05-05
Source Feed nvd
🇸🇦 Saudi Risk Score
8.7
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
exploit-available CWE-119
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