📄 Description (English)
Google Chromium Race Condition Vulnerability — Google Chromium contains a race condition vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
🤖 AI Executive Summary
CVE-2021-21166 is a critical race condition vulnerability in Google Chromium affecting heap memory, exploitable through malicious HTML pages with CVSS 9.0 severity. The vulnerability impacts all Chromium-based browsers including Chrome, Edge, and Opera, with active exploits already available. Immediate patching is essential for Saudi organizations as this poses significant risk to government, banking, and enterprise users relying on these browsers for critical operations.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 19, 2026 23:00
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses critical risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA, NCSC oversight), and critical infrastructure operators. The race condition enables arbitrary code execution through drive-by downloads or watering hole attacks targeting Saudi financial institutions, government portals, and energy sector networks. Healthcare organizations using Chromium-based browsers for patient data access are also at elevated risk. Telecom operators (STC, Mobily) and their enterprise customers face potential compromise of internal systems and customer data.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Telecommunications
Critical Infrastructure
Education
Defense and Security
🎯 MITRE ATT&CK Techniques
T1189 - Drive-by Compromise (malicious HTML delivery)
T1190 - Exploit Public-Facing Application (browser exploitation)
T1203 - Exploitation for Client Execution (heap corruption RCE)
T1566.002 - Phishing: Spearphishing Link (malicious links to crafted HTML)
T1499.004 - Application Exhaustion Flood (race condition DoS)
T1547.001 - Boot or Logon Autostart Execution (post-exploitation persistence)
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Chromium-based browser deployments (Chrome, Edge, Opera) across your organization
2. Disable browser access to untrusted websites until patching is complete
3. Implement network-level controls to block malicious HTML content using web filtering
PATCHING GUIDANCE:
1. Update Google Chrome to version 90.0.4430.85 or later immediately
2. Update Microsoft Edge to version 90.0.818.39 or later
3. Update Opera to version 76 or later
4. Deploy patches via MDM/SCCM for enterprise environments
5. Verify patch deployment across all endpoints within 24 hours
COMPENSATING CONTROLS:
1. Implement Content Security Policy (CSP) headers on all internal web applications
2. Deploy endpoint detection and response (EDR) solutions to monitor for heap corruption exploitation attempts
3. Use browser isolation technology for high-risk users accessing untrusted content
4. Restrict JavaScript execution in browsers where possible
5. Monitor for suspicious process creation and memory access patterns
DETECTION RULES:
1. Monitor for Chrome/Edge/Opera processes spawning unexpected child processes
2. Alert on unusual heap memory allocation patterns followed by code execution
3. Track browser crashes and memory access violations in event logs
4. Monitor network connections from browser processes to suspicious domains
5. Implement YARA rules to detect malicious HTML payloads targeting this CVE
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع نشرات المتصفحات المستندة إلى Chromium (Chrome و Edge و Opera) عبر مؤسستك
2. تعطيل الوصول إلى المواقع غير الموثوقة حتى يتم إكمال التصحيح
3. تنفيذ عناصر تحكم على مستوى الشبكة لحظر محتوى HTML الضار باستخدام تصفية الويب
إرشادات التصحيح:
1. تحديث Google Chrome إلى الإصدار 90.0.4430.85 أو أحدث على الفور
2. تحديث Microsoft Edge إلى الإصدار 90.0.818.39 أو أحدث
3. تحديث Opera إلى الإصدار 76 أو أحدث
4. نشر التصحيحات عبر MDM/SCCM للبيئات المؤسسية
5. التحقق من نشر التصحيح عبر جميع نقاط النهاية خلال 24 ساعة
الضوابط البديلة:
1. تنفيذ سياسة أمان المحتوى (CSP) على جميع تطبيقات الويب الداخلية
2. نشر حلول الكشف والاستجابة على نقاط النهاية (EDR) لمراقبة محاولات استغلال تلف الكومة
3. استخدام تقنية عزل المتصفح للمستخدمين عالي المخاطر الذين يصلون إلى محتوى غير موثوق
4. تقييد تنفيذ JavaScript في المتصفحات حيث يكون ذلك ممكنًا
5. مراقبة أنماط تخصيص الذاكرة المريبة وأنماط الوصول
قواعد الكشف:
1. مراقبة عمليات Chrome/Edge/Opera التي تولد عمليات فرعية غير متوقعة
2. التنبيه على أنماط تخصيص ذاكرة الكومة غير العادية متبوعة بتنفيذ الكود
3. تتبع أعطال المتصفح وانتهاكات الوصول إلى الذاكرة في سجلات الأحداث
4. مراقبة الاتصالات الشبكية من عمليات المتصفح إلى المجالات المريبة
5. تنفيذ قواعد YARA للكشف عن حمولات HTML الضارة التي تستهدف هذا CVE
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information Security Policies (browser security standards)
ECC 2024 A.8.1.1 - User Endpoint Devices (patch management for browsers)
ECC 2024 A.12.2.1 - Change Management (deployment of security patches)
ECC 2024 A.12.6.1 - Management of Technical Vulnerabilities (CVE remediation)
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset Management (inventory of Chromium browsers)
SAMA CSF PR.IP-12 - Information and Communication (patch deployment)
SAMA CSF DE.CM-1 - Detection Processes (monitoring for exploitation)
SAMA CSF RS.MI-2 - Incident Response (containment of compromised systems)
🟡 ISO 27001:2022
ISO 27001:2022 A.12.3.1 - Patch Management (timely application of security patches)
ISO 27001:2022 A.12.6.1 - Management of Technical Vulnerabilities (CVE tracking)
ISO 27001:2022 A.8.1.1 - User Endpoint Devices (secure browser configuration)
ISO 27001:2022 A.5.23 - Information Security for Supplier Relationships (vendor patch delivery)
🟣 PCI DSS v4.0
PCI DSS 6.2 - Security Patches (timely patching of all systems)
PCI DSS 11.2 - Vulnerability Scanning (detection of unpatched browsers)
PCI DSS 12.2 - Configuration Standards (secure browser deployment)
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Google:Chromium