📄 Description (English)
Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability — Cisco IOS and IOS XE Software improperly validates packet data, allowing an unauthenticated, remote attacker to trigger a reload of an affected device, cause a denial-of-service (DoS) condition, or perform code execution on the affected device.
🤖 AI Executive Summary
CVE-2018-0171 is a critical remote code execution vulnerability in Cisco IOS and IOS XE Software's Smart Install feature. An unauthenticated remote attacker can send crafted Smart Install messages to TCP port 4786 to trigger device reload, denial of service, or arbitrary code execution. Public exploits and active exploitation campaigns have been widely documented, including nation-state actors targeting critical infrastructure. This vulnerability has a CVSS score of 9.0 and poses an extreme risk to any organization running affected Cisco network equipment.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 9, 2026 15:10
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses severe risk to Saudi organizations across all critical sectors. Cisco networking equipment is extensively deployed in Saudi banking (SAMA-regulated institutions), government networks (NCA-governed entities), Saudi Aramco and energy sector infrastructure, telecom providers (STC, Mobily, Zain), and healthcare systems. The Smart Install protocol is often enabled by default on Cisco switches, meaning many Saudi organizations may be unknowingly exposed. Nation-state actors have previously exploited this vulnerability to target Middle Eastern infrastructure. Saudi critical infrastructure networks, SCADA/ICS environments in the energy sector, and financial institution backbone networks are at highest risk. Given Saudi Arabia's Vision 2030 digital transformation initiatives, the widespread deployment of Cisco equipment amplifies the attack surface significantly.
🏢 Affected Saudi Sectors
Banking
Government
Energy
Telecommunications
Healthcare
Defense
Education
Transportation
Utilities
⚖️ Saudi Risk Score (AI)
9.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Cisco IOS and IOS XE devices with Smart Install enabled by running: 'show vstack config' or scanning TCP port 4786
2. Disable Smart Install if not actively used: 'no vstack' in global configuration mode
3. Apply Cisco security patches immediately — refer to Cisco Security Advisory cisco-sa-20180328-smi2
NETWORK CONTROLS:
4. Block TCP port 4786 at network perimeter firewalls and internal segmentation points
5. Implement ACLs on affected devices to restrict Smart Install traffic to authorized management stations only
6. Enable Control Plane Policing (CoPP) to rate-limit traffic to the device
DETECTION:
7. Monitor for anomalous traffic to TCP port 4786 using IDS/IPS signatures
8. Deploy Snort/Suricata rules: alert tcp any any -> any 4786 (msg:"Cisco Smart Install Exploit Attempt"; flow:to_server,established;)
9. Review device logs for unexpected reloads or configuration changes
10. Use Cisco's Smart Install Exploitation Tool (SIET) scanner to identify vulnerable devices
LONG-TERM:
11. Upgrade all Cisco IOS/IOS XE devices to patched firmware versions
12. Conduct network-wide audit of Smart Install feature status
13. Implement network segmentation to isolate management plane traffic
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Cisco IOS و IOS XE التي تم تفعيل Smart Install عليها بتنفيذ الأمر: 'show vstack config' أو فحص المنفذ TCP 4786
2. تعطيل Smart Install إذا لم يكن مستخدماً: 'no vstack' في وضع الإعداد العام
3. تطبيق تحديثات Cisco الأمنية فوراً — الرجوع إلى نشرة Cisco الأمنية cisco-sa-20180328-smi2
ضوابط الشبكة:
4. حظر المنفذ TCP 4786 على جدران الحماية المحيطية ونقاط التقسيم الداخلية
5. تطبيق قوائم التحكم بالوصول (ACL) على الأجهزة المتأثرة لتقييد حركة Smart Install على محطات الإدارة المصرح بها فقط
6. تفعيل سياسة حماية مستوى التحكم (CoPP) للحد من حركة المرور إلى الجهاز
الكشف:
7. مراقبة حركة المرور غير الطبيعية إلى المنفذ TCP 4786 باستخدام أنظمة كشف/منع التسلل
8. نشر قواعد Snort/Suricata للكشف عن محاولات الاستغلال
9. مراجعة سجلات الأجهزة للكشف عن عمليات إعادة التشغيل غير المتوقعة أو تغييرات الإعدادات
10. استخدام أداة فحص SIET من Cisco لتحديد الأجهزة المعرضة للخطر
على المدى الطويل:
11. ترقية جميع أجهزة Cisco IOS/IOS XE إلى إصدارات البرامج الثابتة المُحدّثة
12. إجراء تدقيق شامل للشبكة لحالة ميزة Smart Install
13. تطبيق تقسيم الشبكة لعزل حركة مرور مستوى الإدارة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2-3-1 (Network Security)
ECC 2-3-4 (Patch Management)
ECC 2-5-1 (Vulnerability Management)
ECC 2-2-1 (Asset Management)
ECC 2-6-1 (Incident Management)
🔵 SAMA CSF
SAMA CSF 3.3.3 (Network Security Management)
SAMA CSF 3.3.5 (Patch Management)
SAMA CSF 3.3.7 (Vulnerability Management)
SAMA CSF 3.4.1 (Security Event Monitoring)
SAMA CSF 3.3.1 (Infrastructure Security)
🟡 ISO 27001:2022
A.8.8 (Management of technical vulnerabilities)
A.8.9 (Configuration management)
A.8.20 (Networks security)
A.8.21 (Security of network services)
A.8.16 (Monitoring activities)
🟣 PCI DSS v4.0
PCI DSS 6.3.3 (Patching security vulnerabilities)
PCI DSS 1.2.1 (Restrict inbound and outbound traffic)
PCI DSS 11.3 (Vulnerability scanning)
PCI DSS 2.2.1 (System configuration standards)
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Cisco:IOS and IOS XE