📄 Description (English)
A vulnerability in the web-based Cisco IOx application hosting environment management interface of Cisco IOS XE Software could allow an unauthenticated, remote attacker to perform a carriage return line feed (CRLF) injection attack against a user.
This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by sending crafted packets to an affected device. A successful exploit could allow the attacker to arbitrarily inject log entries, manipulate the structure of log files, or obscure legitimate log events.
🤖 AI Executive Summary
CVE-2026-20113 is a CRLF injection vulnerability in Cisco IOS XE Software's IOx web management interface that allows unauthenticated remote attackers to manipulate log files and inject arbitrary entries. With a CVSS score of 5.3 (medium) and no patch currently available, this poses a moderate threat to organizations relying on Cisco networking equipment for critical infrastructure. The vulnerability's impact on log integrity could compromise audit trails and forensic investigations, making it a concern for compliance-sensitive sectors.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 30, 2026 04:11
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi organizations operating Cisco IOS XE devices in critical infrastructure roles. Most affected sectors include: (1) Banking and Financial Services (SAMA-regulated institutions) — log manipulation could obscure fraudulent transactions and compromise audit compliance; (2) Government and Defense (NCA oversight) — affects network monitoring and incident response capabilities; (3) Energy Sector (ARAMCO and utilities) — impacts operational technology network visibility; (4) Telecommunications (STC, Mobily, Zain) — affects network management and security monitoring. The lack of authentication requirement increases risk exposure across all sectors.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Defense
Energy and Utilities
Telecommunications
Healthcare
Critical Infrastructure
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
6.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all Cisco IOS XE devices with IOx application hosting enabled in your environment
2. Restrict network access to the IOx web management interface using firewall rules (port 8443 typically) — limit to authorized administrative networks only
3. Implement network segmentation to isolate management interfaces from untrusted networks
4. Enable enhanced logging and monitoring of IOx management interface access attempts
Patching Guidance:
5. Monitor Cisco Security Advisories for patch availability — currently no patch exists; apply immediately upon release
6. Subscribe to Cisco Product Security Incident Response Team (PSIRT) notifications
Compensating Controls:
7. Deploy Web Application Firewall (WAF) rules to detect and block CRLF injection patterns (\r\n sequences) in HTTP requests to IOx interface
8. Implement strict input validation at network perimeter for IOx management traffic
9. Enable syslog forwarding to external, immutable log storage to prevent local log manipulation
10. Implement log integrity monitoring and alerting for suspicious log file modifications
11. Conduct regular log audits and maintain offline backups of critical logs
Detection Rules:
12. Monitor for HTTP requests containing encoded CRLF characters (%0D%0A, \r\n) targeting IOx management endpoints
13. Alert on unexpected log file size changes or timestamps
14. Track failed authentication attempts to IOx interface from external sources
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع أجهزة Cisco IOS XE مع تفعيل استضافة تطبيقات IOx في بيئتك
2. قيد الوصول إلى واجهة إدارة الويب IOx باستخدام قواعد جدار الحماية (المنفذ 8443 عادة) — حصر الوصول على الشبكات الإدارية المصرح بها فقط
3. طبق تقسيم الشبكة لعزل واجهات الإدارة عن الشبكات غير الموثوقة
4. فعّل السجلات المحسّنة ومراقبة محاولات الوصول إلى واجهة إدارة IOx
إرشادات التصحيح:
5. راقب استشارات أمان Cisco للحصول على توفر التصحيح — لا يوجد تصحيح حالياً؛ طبقه فوراً عند الإصدار
6. اشترك في إشعارات فريق استجابة حوادث أمان منتجات Cisco (PSIRT)
الضوابط البديلة:
7. نشر قواعد جدار تطبيقات الويب (WAF) للكشف عن أنماط حقن CRLF وحجبها
8. طبق التحقق الصارم من صحة المدخلات على محيط الشبكة لحركة إدارة IOx
9. فعّل إعادة توجيه syslog إلى تخزين السجلات الخارجي غير القابل للتغيير
10. طبق مراقبة سلامة السجلات والتنبيهات للتعديلات المريبة على ملفات السجل
11. أجرِ عمليات تدقيق منتظمة للسجلات واحتفظ بنسخ احتياطية غير متصلة بالإنترنت
12. راقب طلبات HTTP التي تحتوي على أحرف CRLF المشفرة (%0D%0A) الموجهة إلى نقاط نهاية إدارة IOx
13. أصدر تنبيهات عند تغييرات حجم ملف السجل أو الطوابع الزمنية غير المتوقعة
14. تتبع محاولات المصادقة الفاشلة لواجهة IOx من مصادر خارجية
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.4.1 — Event logging and monitoring controls
ECC 2024 A.12.4.3 — Protection of log information
ECC 2024 A.13.1.3 — Segregation of networks
ECC 2024 A.14.2.1 — Secure development policy
🔵 SAMA CSF
SAMA CSF ID.AM-2 — Asset inventory and management
SAMA CSF DE.CM-1 — Detection and analysis capabilities
SAMA CSF DE.CM-3 — Detection of unauthorized network traffic
SAMA CSF RS.CO-2 — Incident response coordination
🟡 ISO 27001:2022
ISO 27001:2022 A.5.15 — Access control
ISO 27001:2022 A.8.2 — User endpoint devices
ISO 27001:2022 A.8.3 — Removable media
ISO 27001:2022 A.12.4.1 — Event logging
ISO 27001:2022 A.12.4.3 — Administrator and operator logs
🟣 PCI DSS v4.0.1
PCI DSS 3.2.1 — Render PAN unreadable (if payment systems affected)
PCI DSS 10.2 — Implement automated audit trails
PCI DSS 10.3 — Protect audit trail history