📄 Description (English)
Cisco RV Series Routers Deserialization of Untrusted Data Vulnerability — A deserialization of untrusted data vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers could allow an attacker to execute code with root privileges.
🤖 AI Executive Summary
CVE-2019-15271 is a critical deserialization vulnerability (CVSS 9.0) in the web-based management interface of Cisco Small Business RV Series Routers, allowing remote attackers to execute arbitrary code with root privileges. The vulnerability stems from improper handling of untrusted serialized data, enabling complete device compromise. A public exploit is available, significantly elevating the risk of active exploitation in the wild. Organizations using these routers as network perimeter or branch office devices face immediate risk of full network compromise.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 14, 2026 13:10
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations across multiple critical sectors are at significant risk. Government entities and ministries using Cisco RV Series routers for branch connectivity face potential network infiltration that could compromise sensitive data subject to NCA regulations. Banking and financial institutions regulated by SAMA that deploy these routers in branch offices or as secondary network devices risk unauthorized access to financial systems and customer data. Energy sector organizations including ARAMCO and SEC subsidiaries using these devices for remote site connectivity face operational technology (OT) network exposure. Telecom providers such as STC and Mobily deploying these in customer-premises or internal branch environments are also at risk. The availability of a public exploit makes this particularly dangerous for Saudi SMEs and government agencies that may have delayed patching, and threat actors targeting Saudi infrastructure (including APT groups known to target Gulf region) could leverage this for initial access.
🏢 Affected Saudi Sectors
Banking
Government
Energy
Telecom
Healthcare
Education
Retail
SME
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS (0-24 hours):
1. Identify all Cisco RV Series routers in your environment using network asset inventory tools.
2. Disable remote web-based management access from the internet immediately — restrict management interface to trusted internal IPs only.
3. Place affected routers behind additional firewall rules blocking external access to management ports (typically TCP 443/80).
4. Review router logs for suspicious deserialization activity or unexpected root-level process execution.
PATCHING GUIDANCE:
5. Apply the latest firmware updates provided by Cisco for affected RV Series models immediately — refer to Cisco Security Advisory cisco-sa-20191106-rv-rce.
6. Verify firmware integrity using Cisco's published checksums before deployment.
7. Prioritize internet-facing and branch-office routers first.
COMPENSATING CONTROLS (if patching is delayed):
8. Implement ACLs to restrict management interface access to dedicated management VLANs only.
9. Deploy an IDS/IPS rule to detect deserialization exploit payloads targeting Cisco RV management interfaces.
10. Enable logging and forward to SIEM for anomaly detection.
11. Consider replacing end-of-life RV Series models with supported hardware.
DETECTION RULES:
12. Monitor for unexpected outbound connections from router management IPs.
13. Alert on HTTP POST requests to management interface containing serialized Java object headers (e.g., 'ac ed 00 05' in hex).
14. Use Cisco's PSIRT advisories and Snare/Snort signatures for this CVE.
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية (خلال 0-24 ساعة):
1. تحديد جميع أجهزة توجيه Cisco RV Series في بيئتك باستخدام أدوات جرد الأصول الشبكية.
2. تعطيل الوصول عن بُعد إلى واجهة الإدارة عبر الويب من الإنترنت فوراً — تقييد واجهة الإدارة على عناوين IP الداخلية الموثوقة فقط.
3. وضع الأجهزة المتأثرة خلف قواعد جدار حماية إضافية تحجب الوصول الخارجي إلى منافذ الإدارة (عادةً TCP 443/80).
4. مراجعة سجلات الأجهزة بحثاً عن نشاط مشبوه أو تنفيذ عمليات غير متوقعة بصلاحيات الجذر.
إرشادات التصحيح:
5. تطبيق آخر تحديثات البرامج الثابتة من Cisco للطرازات المتأثرة فوراً — الرجوع إلى التنبيه الأمني cisco-sa-20191106-rv-rce.
6. التحقق من سلامة البرامج الثابتة باستخدام المجاميع الاختبارية المنشورة من Cisco قبل النشر.
7. إعطاء الأولوية لأجهزة التوجيه المكشوفة على الإنترنت وأجهزة الفروع أولاً.
ضوابط التعويض (في حال تأخر التصحيح):
8. تطبيق قوائم التحكم بالوصول لتقييد واجهة الإدارة على شبكات VLAN الإدارية المخصصة فقط.
9. نشر قواعد IDS/IPS للكشف عن حمولات استغلال إلغاء التسلسل التي تستهدف واجهات إدارة Cisco RV.
10. تفعيل التسجيل وإرساله إلى نظام SIEM للكشف عن الشذوذات.
11. النظر في استبدال طرازات RV Series التي انتهى دعمها بأجهزة مدعومة.
قواعد الكشف:
12. مراقبة الاتصالات الصادرة غير المتوقعة من عناوين IP لإدارة الأجهزة.
13. التنبيه على طلبات HTTP POST إلى واجهة الإدارة التي تحتوي على رؤوس كائنات Java المتسلسلة.
14. استخدام تنبيهات Cisco PSIRT وتوقيعات Snort الخاصة بهذا CVE.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-1-4-2: Asset Management — Inventory of network devices
ECC-2-3-1: Cybersecurity Vulnerability Management — Patch management for network infrastructure
ECC-2-5-1: Network Security — Secure configuration of network devices
ECC-2-5-3: Network Security — Remote access controls and restrictions
ECC-3-3-3: Secure Configuration — Hardening of network infrastructure components
🔵 SAMA CSF
3.3.6 — Vulnerability Management: Timely patching of critical network infrastructure
3.3.7 — Patch Management: Application of vendor-supplied security patches
3.4.2 — Network Security: Restriction of management interface access
3.4.5 — Perimeter Security: Protection of internet-facing network devices
3.2.3 — Asset Management: Identification and classification of network assets
🟡 ISO 27001:2022
A.8.8 — Management of technical vulnerabilities
A.8.20 — Networks security
A.8.21 — Security of network services
A.8.22 — Segregation of networks
A.5.37 — Documented operating procedures for patch management
🟣 PCI DSS v4.0
Requirement 6.3.3 — All system components are protected from known vulnerabilities by installing applicable security patches
Requirement 1.3.2 — Restrict inbound and outbound traffic to that which is necessary for the cardholder data environment
Requirement 12.3.4 — Hardware and software technologies are reviewed at least once every 12 months
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Cisco:RV Series Routers