📄 Description (English)
NordVPN 6.19.6 contains a denial of service vulnerability that allows local attackers to crash the application by submitting an excessively long string in the email input field. Attackers can paste a buffer of 100,000 characters into the email field during login to trigger an application crash.
🤖 AI Executive Summary
NordVPN 6.19.6 contains a denial of service vulnerability allowing local attackers to crash the application by submitting excessively long strings in the email input field. This vulnerability requires local access and user interaction, making it a low-risk threat in most enterprise environments. However, it could be exploited to disrupt VPN connectivity for remote workers or to facilitate social engineering attacks.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 22, 2026 16:18
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations heavily reliant on VPN for remote workforce management (particularly post-pandemic hybrid work models) face operational disruption risks. Most impacted sectors include: Banking and Financial Services (SAMA-regulated institutions using VPN for secure access), Government agencies (NCA oversight), Telecommunications (STC, Mobily), and Energy sector (ARAMCO, downstream operators). The vulnerability's local-only nature limits widespread impact, but could be chained with other vulnerabilities in multi-stage attacks targeting Saudi enterprises.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Telecommunications
Energy and Utilities
Healthcare
Technology and IT Services
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
4.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Upgrade NordVPN to version 6.19.7 or later when available
2. Implement input validation on email fields at application level
3. Monitor for application crashes in VPN client logs
4. Educate users not to paste excessively long strings into login fields
Compensating Controls (if patch unavailable):
1. Deploy application whitelisting to restrict NordVPN execution
2. Implement endpoint detection and response (EDR) to monitor for application crashes
3. Use alternative VPN solutions temporarily if critical
4. Restrict VPN client installation to trusted endpoints only
Detection Rules:
1. Monitor for NordVPN process crashes in Windows Event Viewer (Event ID 1000)
2. Alert on email field input exceeding 1000 characters in VPN client logs
3. Track application restart patterns indicating repeated crashes
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. ترقية NordVPN إلى الإصدار 6.19.7 أو أحدث عند توفره
2. تطبيق التحقق من صحة المدخلات على حقول البريد الإلكتروني على مستوى التطبيق
3. مراقبة أعطال التطبيق في سجلات عميل VPN
4. تثقيف المستخدمين بعدم لصق سلاسل نصية طويلة جداً في حقول تسجيل الدخول
الضوابط البديلة (إذا لم يكن الإصلاح متاحاً):
1. نشر قائمة بيضاء للتطبيقات لتقييد تنفيذ NordVPN
2. تطبيق كشف ومعالجة نقاط النهاية (EDR) لمراقبة أعطال التطبيق
3. استخدام حلول VPN بديلة مؤقتاً إذا لزم الأمر
4. تقييد تثبيت عميل VPN على نقاط النهاية الموثوقة فقط
قواعد الكشف:
1. مراقبة أعطال عملية NordVPN في Windows Event Viewer (معرف الحدث 1000)
2. التنبيه على مدخلات حقل البريد التي تتجاوز 1000 حرف في سجلات عميل VPN
3. تتبع أنماط إعادة تشغيل التطبيق التي تشير إلى أعطال متكررة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information Security Policies
ECC 2024 A.6.1.1 - Organization of Information Security
ECC 2024 A.13.1.1 - Network Security
🔵 SAMA CSF
SAMA CSF ID.BE-3 - Resilience Planning
SAMA CSF PR.DS-6 - Data Security
SAMA CSF DE.CM-1 - Detection Processes
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for Information Security
ISO 27001:2022 A.8.1 - User Endpoint Devices
ISO 27001:2022 A.13.1 - Network Security
🔗 References & Sources 4
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https://downloads.nordcdn.com/apps/windows/10/NordVPN/latest/NordVPNSetup.exe
disclosure@vulncheck.com
https://nordvpn.com/
disclosure@vulncheck.com
https://www.exploit-db.com/exploits/46343
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/nordvpn-denial-of-service-via-email-field-buffer-o...
disclosure@vulncheck.com