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Global supply_chain Software Development and Technology CRITICAL 41m Global apt Multiple sectors HIGH 2h Global general Digital Content & Intellectual Property MEDIUM 3h Global malware Technology and Software Development CRITICAL 3h Global ddos Technology and Social Media HIGH 3h Global phishing Financial Services, Telecommunications, General Public HIGH 4h Global supply_chain Software Development and Technology CRITICAL 5h Global apt Multiple sectors / Critical Infrastructure CRITICAL 5h Global malware Financial Services CRITICAL 5h Global general Software/Technology LOW 5h Global supply_chain Software Development and Technology CRITICAL 41m Global apt Multiple sectors HIGH 2h Global general Digital Content & Intellectual Property MEDIUM 3h Global malware Technology and Software Development CRITICAL 3h Global ddos Technology and Social Media HIGH 3h Global phishing Financial Services, Telecommunications, General Public HIGH 4h Global supply_chain Software Development and Technology CRITICAL 5h Global apt Multiple sectors / Critical Infrastructure CRITICAL 5h Global malware Financial Services CRITICAL 5h Global general Software/Technology LOW 5h Global supply_chain Software Development and Technology CRITICAL 41m Global apt Multiple sectors HIGH 2h Global general Digital Content & Intellectual Property MEDIUM 3h Global malware Technology and Software Development CRITICAL 3h Global ddos Technology and Social Media HIGH 3h Global phishing Financial Services, Telecommunications, General Public HIGH 4h Global supply_chain Software Development and Technology CRITICAL 5h Global apt Multiple sectors / Critical Infrastructure CRITICAL 5h Global malware Financial Services CRITICAL 5h Global general Software/Technology LOW 5h
Vulnerabilities

CVE-2023-28771

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Zyxel Multiple Firewalls OS Command Injection Vulnerability — Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG firewalls allow for improper error message handling which could allow an unauthenticated attacker
Published: May 31, 2023  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Zyxel Multiple Firewalls OS Command Injection Vulnerability — Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG firewalls allow for improper error message handling which could allow an unauthenticated attacker to execute OS commands remotely by sending crafted packets to an affected device.

🤖 AI Executive Summary

Zyxel firewalls (ATP, USG FLEX, VPN, ZyWALL/USG) contain an OS command injection vulnerability in error message handling that allows unauthenticated remote code execution. Attackers can exploit this by sending specially crafted packets to execute arbitrary commands on affected devices.

📄 Description (Arabic)

تحتوي جدران حماية Zyxel المتعددة على ثغرة حرجة في معالجة رسائل الخطأ تسمح بحقن أوامر نظام التشغيل. يمكن لمهاجم بدون مصادقة إرسال حزم مصنعة لتنفيذ أوامر تعسفية على الجهاز المتأثر. هذه الثغرة تؤثر على نماذج ATP و USG FLEX و VPN و ZyWALL/USG.

🤖 ملخص تنفيذي (AI)

ثغرة حقن أوامر نظام التشغيل في جدران حماية Zyxel المتعددة تسمح بتنفيذ أوامر بعيدة دون مصادقة. يمكن للمهاجمين استغلال معالجة رسائل الخطأ غير الصحيحة بإرسال حزم مصنعة لتنفيذ أوامر تعسفية.

🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 19:43
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
banking telecom energy government healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.0
/ 10.0
🔧 Remediation Steps (English)
Immediately update affected Zyxel firewall models (ATP, USG FLEX, VPN, ZyWALL/USG) to the latest patched firmware version. Restrict network access to firewall management interfaces and implement network segmentation. Monitor firewall logs for suspicious packet patterns and unauthorized command execution attempts.
🔧 خطوات المعالجة (العربية)
قم بتحديث نماذج جدران الحماية Zyxel المتأثرة فوراً إلى أحدث إصدار ثابت. قيد الوصول إلى واجهات إدارة جدار الحماية وطبق تقسيم الشبكة. راقب سجلات جدار الحماية للكشف عن أنماط الحزم المريبة ومحاولات تنفيذ الأوامر غير المصرح بها.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
2.1 2.2 3.1 4.1
🔵 SAMA CSF
ID.BE-1 PR.AC-1 PR.PT-1 DE.CM-1
🟡 ISO 27001:2022
A.12.6.1 A.14.2.1 A.14.2.5
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Zyxel:Multiple Firewalls
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS94.35%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2023-06-21
Published 2023-05-31
Source Feed cisa_kev
Views 4
🇸🇦 Saudi Risk Score
9.0
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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