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Vulnerabilities

CVE-2011-1889

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Microsoft Forefront TMG Firewall Client Remote Code Execution Vulnerability
Published: Mar 3, 2022  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Microsoft Forefront TMG Remote Code Execution Vulnerability — A remote code execution vulnerability exists in the Forefront Threat Management Gateway (TMG) Firewall Client Winsock provider that could allow code execution in the security context of the client application.

🤖 AI Executive Summary

A critical remote code execution vulnerability (CVE-2011-1889) exists in Microsoft Forefront Threat Management Gateway (TMG) Firewall Client Winsock provider with CVSS 9.0. Attackers can exploit this flaw to execute arbitrary code in the security context of the client application. Active exploits exist with no official patch available, requiring immediate compensating controls.

📄 Description (Arabic)

تؤثر هذه الثغرة الأمنية الحرجة على موفر Winsock في عميل جدار الحماية Microsoft Forefront TMG، حيث تسمح للمهاجمين بتنفيذ تعليمات برمجية ضارة عن بُعد ضمن سياق أمان التطبيق المستهدف. يمكن استغلال الثغرة من خلال حزم شبكية مصممة خصيصاً لاستهداف العملاء الذين يستخدمون Firewall Client. نظراً لعدم توفر تصحيح رسمي ووجود استغلالات نشطة، تشكل هذه الثغرة خطراً كبيراً على المؤسسات التي تعتمد على Forefront TMG لحماية شبكاتها. يجب على المؤسسات السعودية اتخاذ إجراءات تعويضية عاجلة لتقليل المخاطر المحتملة.

🤖 ملخص تنفيذي (AI)

توجد ثغرة حرجة لتنفيذ التعليمات البرمجية عن بُعد (CVE-2011-1889) في موفر Winsock لعميل جدار الحماية Microsoft Forefront Threat Management Gateway (TMG) بتقييم CVSS 9.0. يمكن للمهاجمين استغلال هذه الثغرة لتنفيذ تعليمات برمجية عشوائية في سياق أمان تطبيق العميل. توجد استغلالات نشطة دون توفر تصحيح رسمي، مما يتطلب تطبيق ضوابط تعويضية فورية.

🤖 AI Intelligence Analysis Analyzed: Feb 28, 2026 09:17
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using Microsoft Forefront TMG for network security face critical risk as this unpatched vulnerability allows remote attackers to compromise client systems and potentially pivot into internal networks. Financial institutions, government entities, and enterprises relying on TMG for secure gateway services must implement immediate compensating controls to prevent exploitation.
🏢 Affected Saudi Sectors
القطاع المالي والمصرفي الجهات الحكومية قطاع الاتصالات وتقنية المعلومات قطاع الطاقة والمرافق الحيوية المؤسسات الكبرى والشركات
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.0
/ 10.0
🔧 Remediation Steps (English)
1. Immediately disable or restrict Forefront TMG Firewall Client deployment where not critically required, and migrate to supported modern firewall solutions such as Azure Firewall or next-generation firewalls
2. Implement network segmentation and strict access controls to isolate systems running TMG Firewall Client, monitor all network traffic for suspicious Winsock-related activities, and deploy intrusion detection/prevention systems with signatures for CVE-2011-1889 exploitation attempts
3. Apply application whitelisting and endpoint detection and response (EDR) solutions on all client systems, restrict outbound connections from TMG clients, and develop an urgent migration plan to replace the end-of-life Forefront TMG infrastructure within 90 days
🔧 خطوات المعالجة (العربية)
1. تعطيل أو تقييد نشر عميل جدار الحماية Forefront TMG فوراً حيثما لا يكون مطلوباً بشكل حرج، والانتقال إلى حلول جدار حماية حديثة مدعومة مثل Azure Firewall أو جدران الحماية من الجيل التالي
2. تطبيق تجزئة الشبكة وضوابط وصول صارمة لعزل الأنظمة التي تشغل عميل جدار الحماية TMG، ومراقبة جميع حركة مرور الشبكة للأنشطة المشبوهة المتعلقة بـ Winsock، ونشر أنظمة كشف ومنع التسلل مع توقيعات لمحاولات استغلال CVE-2011-1889
3. تطبيق قوائم التطبيقات المسموحة وحلول الكشف والاستجابة للنقاط الطرفية (EDR) على جميع أنظمة العملاء، وتقييد الاتصالات الصادرة من عملاء TMG، وتطوير خطة انتقال عاجلة لاستبدال البنية التحتية لـ Forefront TMG منتهية الصلاحية خلال 90 يوماً
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-1-2 ECC-2-1 ECC-3-1 ECC-4-1 ECC-5-2
🔵 SAMA CSF
CCC-1.1 CCC-2.2 CCC-4.4 TVM-1.1 TVM-2.1 TVM-3.1
🟡 ISO 27001:2022
A.12.6.1 A.14.2.2 A.16.1.3 A.18.2.3
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Forefront Threat Management Gateway (TMG)
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS85.35%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2022-03-24
Published 2022-03-03
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
9.0
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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