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Global malware Financial Services, Cryptocurrency CRITICAL 46m Global general Financial Services and E-commerce MEDIUM 49m Global data_breach Social Media and Communications CRITICAL 1h Global general Cybersecurity Operations HIGH 1h Global phishing Technology and Consumer Services HIGH 1h Global data_breach Multiple sectors HIGH 2h Global vulnerability Government and Critical Infrastructure CRITICAL 2h Global vulnerability Multiple sectors CRITICAL 2h Global apt Financial Services, Government HIGH 2h Global insider Cross-sector CRITICAL 3h Global malware Financial Services, Cryptocurrency CRITICAL 46m Global general Financial Services and E-commerce MEDIUM 49m Global data_breach Social Media and Communications CRITICAL 1h Global general Cybersecurity Operations HIGH 1h Global phishing Technology and Consumer Services HIGH 1h Global data_breach Multiple sectors HIGH 2h Global vulnerability Government and Critical Infrastructure CRITICAL 2h Global vulnerability Multiple sectors CRITICAL 2h Global apt Financial Services, Government HIGH 2h Global insider Cross-sector CRITICAL 3h Global malware Financial Services, Cryptocurrency CRITICAL 46m Global general Financial Services and E-commerce MEDIUM 49m Global data_breach Social Media and Communications CRITICAL 1h Global general Cybersecurity Operations HIGH 1h Global phishing Technology and Consumer Services HIGH 1h Global data_breach Multiple sectors HIGH 2h Global vulnerability Government and Critical Infrastructure CRITICAL 2h Global vulnerability Multiple sectors CRITICAL 2h Global apt Financial Services, Government HIGH 2h Global insider Cross-sector CRITICAL 3h
Vulnerabilities

CVE-2021-21148

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Google Chromium V8 Heap Buffer Overflow Vulnerability — Google Chromium V8 Engine contains a heap buffer overflow vulnerability that allows a remote attacker to potentially exploit heap corruption via
Published: Nov 3, 2021  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Google Chromium V8 Heap Buffer Overflow Vulnerability — Google Chromium V8 Engine contains a heap buffer overflow 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-2021-21148 is a critical heap buffer overflow vulnerability in Google Chromium V8 engine (CVSS 9.0) affecting multiple browsers including Chrome, Edge, and Opera. Remote attackers can exploit this via crafted HTML pages to achieve arbitrary code execution and heap corruption. Immediate patching is essential as exploits are publicly available and widely used in targeted attacks against Saudi organizations.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 19, 2026 22:57
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses severe risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA, CITC), and critical infrastructure operators. Financial institutions using web-based platforms for customer interactions face direct exploitation risk. Government employees and critical infrastructure operators accessing web content are vulnerable to targeted attacks. Healthcare sector (MOH) and energy sector (ARAMCO, SEC) face operational disruption risks. Telecom operators (STC, Mobily, Zain) managing web-based services are at high risk. The widespread use of Chromium-based browsers in Saudi enterprises makes this a pervasive threat.
🏢 Affected Saudi Sectors
Banking and Financial Services (SAMA-regulated) Government and Public Administration (NCA, CITC) Healthcare (MOH) Energy and Utilities (ARAMCO, SEC) Telecommunications (STC, Mobily, Zain) Critical Infrastructure Education E-commerce
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Inventory all Chromium-based browsers (Chrome, Edge, Opera) across enterprise infrastructure
2. Disable JavaScript execution in browsers handling untrusted content as temporary measure
3. Restrict web browsing to whitelisted domains where possible
4. Alert users to avoid clicking suspicious links or visiting untrusted websites

PATCHING GUIDANCE:
1. Update Google Chrome to version 89.0.4389.90 or later immediately
2. Update Microsoft Edge to version 89.0.774.50 or later
3. Update Opera to version 75.0.3969.243 or later
4. Deploy patches via WSUS/MDM to all endpoints within 24-48 hours
5. Prioritize patching for systems handling sensitive financial or government data

COMPENSATING CONTROLS:
1. Implement network-level content filtering to block malicious HTML payloads
2. Deploy endpoint detection and response (EDR) solutions to detect heap corruption attempts
3. Enable browser sandboxing features and Site Isolation in Chrome
4. Implement application whitelisting to prevent unauthorized code execution
5. Monitor for suspicious process creation from browser processes

DETECTION RULES:
1. Monitor for abnormal memory access patterns in V8 engine processes
2. Alert on unexpected child processes spawned from browser.exe or chrome.exe
3. Detect unusual heap allocation patterns followed by code execution
4. Monitor for suspicious network connections initiated from browser processes
5. Track failed memory protection mechanisms (DEP/ASLR bypasses)
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حصر جميع متصفحات Chromium (Chrome و Edge و Opera) عبر البنية التحتية للمؤسسة
2. تعطيل تنفيذ JavaScript في المتصفحات التي تتعامل مع محتوى غير موثوق كإجراء مؤقت
3. تقييد تصفح الويب بالنطاقات المدرجة في القائمة البيضاء حيثما أمكن
4. تنبيه المستخدمين لتجنب النقر على الروابط المريبة أو زيارة المواقع غير الموثوقة

إرشادات التصحيح:
1. تحديث Google Chrome إلى الإصدار 89.0.4389.90 أو أحدث فورًا
2. تحديث Microsoft Edge إلى الإصدار 89.0.774.50 أو أحدث
3. تحديث Opera إلى الإصدار 75.0.3969.243 أو أحدث
4. نشر التصحيحات عبر WSUS/MDM لجميع نقاط النهاية خلال 24-48 ساعة
5. إعطاء الأولوية لتصحيح الأنظمة التي تتعامل مع البيانات المالية أو الحكومية الحساسة

الضوابط البديلة:
1. تطبيق تصفية المحتوى على مستوى الشبكة لحجب حمولات HTML الضارة
2. نشر حلول الكشف والاستجابة على نقاط النهاية (EDR) للكشف عن محاولات تلف الذاكرة
3. تفعيل ميزات الحماية الرملية وعزل الموقع في Chrome
4. تطبيق قائمة بيضاء للتطبيقات لمنع تنفيذ الأكواد غير المصرح بها
5. مراقبة إنشاء العمليات المريبة من عمليات المتصفح

قواعد الكشف:
1. مراقبة أنماط الوصول غير الطبيعية للذاكرة في عمليات محرك V8
2. التنبيه على العمليات الفرعية غير المتوقعة التي تنشأ من browser.exe أو chrome.exe
3. الكشف عن أنماط تخصيص الذاكرة غير المعتادة متبوعة بتنفيذ الأكواد
4. مراقبة الاتصالات الشبكية المريبة التي تبدأ من عمليات المتصفح
5. تتبع آليات الحماية من الذاكرة الفاشلة (DEP/ASLR bypasses)
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures A.8.1.1 - User endpoint devices protection A.8.2.1 - Malware protection A.8.2.3 - Log management A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification PR.IP-12 - Software development and acquisition security PR.PT-3 - Access control and least privilege DE.CM-8 - Vulnerability scans and assessments RS.MI-2 - Incident response and containment
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy A.12.2.1 - Change management procedures A.12.3.1 - Segregation of development, test and production environments
🟣 PCI DSS v4.0
6.2 - Security patches and updates 6.5.1 - Injection flaws prevention 11.2 - Vulnerability scanning
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Google:Chromium V8
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS24.87%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2021-11-17
Published 2021-11-03
Source Feed cisa_kev
Views 2
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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