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Vulnerabilities

CVE-2026-5979

High
CWE-119 — Weakness Type
Published: Apr 9, 2026  ·  Modified: Apr 16, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A vulnerability was detected in D-Link DIR-605L 2.13B01. Affected by this vulnerability is the function formVirtualServ of the file /goform/formVirtualServ of the component POST Request Handler. The manipulation of the argument curTime results in buffer overflow. The attack can be launched remotely. The exploit is now public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

🤖 AI Executive Summary

A critical buffer overflow vulnerability exists in D-Link DIR-605L 2.13B01 routers affecting the virtual server configuration function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the curTime parameter in POST requests to /goform/formVirtualServ. With no patch available and the product reaching end-of-life, organizations must implement immediate network segmentation and replacement strategies.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 18:16
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using legacy D-Link DIR-605L routers face significant risk, particularly in: Banking sector (SAMA-regulated institutions) using these devices for branch connectivity; Government agencies (NCA oversight) with aging network infrastructure; Healthcare facilities managing patient data networks; Telecommunications providers (STC, Mobily) with legacy equipment; Energy sector (ARAMCO, utilities) with industrial network segments. The lack of patch availability and end-of-life status makes this a critical infrastructure concern for organizations unable to immediately replace affected devices.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare and Medical Facilities Energy and Utilities Telecommunications Education Retail and E-commerce
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify and inventory all D-Link DIR-605L 2.13B01 devices in your network using network scanning tools
2. Isolate affected routers from critical network segments using network segmentation and VLANs
3. Disable remote management access to these devices immediately
4. Block external access to port 80/443 on affected devices using firewall rules
5. Monitor for suspicious POST requests to /goform/formVirtualServ endpoint

PATCHING GUIDANCE:
1. Since no patch is available, prioritize replacement with current D-Link models or alternative vendors
2. Establish replacement timeline: critical systems within 30 days, others within 90 days
3. Verify replacement devices support current security standards (TLS 1.2+, strong encryption)

COMPENSATING CONTROLS:
1. Deploy Web Application Firewall (WAF) rules to block malformed POST requests to /goform/formVirtualServ
2. Implement network-based intrusion detection signatures for buffer overflow attempts
3. Restrict administrative access to these devices to specific trusted IP ranges only
4. Enable detailed logging of all HTTP requests to affected endpoints
5. Implement network segmentation to limit lateral movement if device is compromised

DETECTION RULES:
1. Alert on POST requests to /goform/formVirtualServ with curTime parameter exceeding 256 bytes
2. Monitor for unusual process execution or network connections originating from router IP addresses
3. Track failed authentication attempts to router management interfaces
4. Alert on firmware modification attempts or unexpected configuration changes
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد وحصر جميع أجهزة D-Link DIR-605L 2.13B01 في شبكتك باستخدام أدوات المسح
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة باستخدام تقسيم الشبكة و VLANs
3. تعطيل الوصول الإداري البعيد لهذه الأجهزة فوراً
4. حظر الوصول الخارجي للمنافذ 80/443 على الأجهزة المتأثرة باستخدام قواعد جدار الحماية
5. مراقبة طلبات POST المريبة إلى نقطة نهاية /goform/formVirtualServ

إرشادات التصحيح:
1. بما أنه لا يوجد تصحيح متاح، أولويات الاستبدال بأجهزة D-Link الحالية أو بدائل أخرى
2. إنشاء جدول زمني للاستبدال: الأنظمة الحرجة خلال 30 يوماً، والأخرى خلال 90 يوماً
3. التحقق من أن الأجهزة البديلة تدعم معايير الأمان الحالية (TLS 1.2+، التشفير القوي)

الضوابط البديلة:
1. نشر قواعد جدار تطبيقات الويب (WAF) لحظر طلبات POST المشوهة إلى /goform/formVirtualServ
2. تنفيذ توقيعات كشف الاختراق القائمة على الشبكة لمحاولات تجاوز المخزن المؤقت
3. تقييد الوصول الإداري لهذه الأجهزة إلى نطاقات عناوين IP موثوقة محددة فقط
4. تفعيل تسجيل مفصل لجميع طلبات HTTP إلى نقاط النهاية المتأثرة
5. تنفيذ تقسيم الشبكة لتحديد الحركة الجانبية في حالة اختراق الجهاز

قواعد الكشف:
1. تنبيه على طلبات POST إلى /goform/formVirtualServ مع معامل curTime يتجاوز 256 بايت
2. مراقبة تنفيذ العمليات غير العادية أو الاتصالات الشبكية الناشئة من عناوين IP الموجهات
3. تتبع محاولات المصادقة الفاشلة لواجهات إدارة الموجهات
4. تنبيه على محاولات تعديل البرامج الثابتة أو التغييرات غير المتوقعة في الإعدادات
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.8.1 - Asset Management and Inventory Control ECC 2024 A.8.2 - Information Security Perimeter ECC 2024 A.8.3 - Network Segmentation ECC 2024 A.12.6 - Management of Technical Vulnerabilities ECC 2024 A.14.2 - System Development and Change Management
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Physical Devices and Software Inventory SAMA CSF PR.AC-3 - Access Control and Management SAMA CSF PR.PT-1 - Protective Technology Implementation SAMA CSF DE.CM-1 - Network Monitoring and Detection SAMA CSF RS.MI-1 - Incident Response and Recovery
🟡 ISO 27001:2022
ISO 27001:2022 A.5.9 - Access Control ISO 27001:2022 A.8.1 - Asset Management ISO 27001:2022 A.8.2 - Information Security Perimeter ISO 27001:2022 A.8.3 - Network Segmentation ISO 27001:2022 A.12.6 - Management of Technical Vulnerabilities ISO 27001:2022 A.14.2 - System Development and Change Management
🟣 PCI DSS v4.0.1
PCI DSS 1.1 - Firewall Configuration Standards PCI DSS 1.3 - Network Segmentation PCI DSS 2.1 - Default Security Parameters PCI DSS 6.2 - Security Patches and Updates PCI DSS 11.3 - Penetration Testing
📊 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
EPSS0.05%
Exploit No
Patch ✗ No
Published 2026-04-09
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
8.5
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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