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Vulnerabilities

CVE-2009-3459

Critical 🇺🇸 CISA KEV
Published: May 20, 2026  ·  Source: CISA_KEV
CVSS v3
9.8
🔗 NVD Official
📄 Description (English)

Adobe Acrobat and Reader — CVE-2009-3459
Adobe Acrobat and Reader contain a heap-based buffer overflow vulnerability which could allow remote attackers to execute arbitrary code via a crafted PDF file that triggers memory corruption.

Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due Date: 2026-06-03

🤖 AI Executive Summary

CVE-2009-3459 is a critical heap-based buffer overflow vulnerability in Adobe Acrobat and Reader (CVSS 9.8) that allows remote code execution through maliciously crafted PDF files. This 15-year-old vulnerability remains dangerous if unpatched systems are still in use within Saudi organizations. The lack of available patches necessitates immediate mitigation strategies and potential product discontinuation for affected deployments.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 21, 2026 04:18
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), and healthcare organizations that may still rely on legacy Adobe Reader installations for document processing. ARAMCO and energy sector organizations handling sensitive technical documentation are particularly vulnerable. Telecom operators (STC, Mobily) and financial services firms processing PDF-based reports face elevated risk. The vulnerability is especially critical in air-gapped or legacy systems where patching may be delayed or impossible.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare and Medical Services Energy and Petroleum (ARAMCO) Telecommunications (STC, Mobily) Insurance Education Manufacturing
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Conduct urgent inventory of all Adobe Acrobat and Reader installations across the organization, prioritizing critical systems and user-facing applications
2. Disable or restrict PDF file handling from untrusted sources immediately
3. Implement network-level controls to block PDF downloads from external sources where operationally feasible
4. Disable JavaScript execution in Adobe Reader (Edit > Preferences > JavaScript > Disable JavaScript)

Patching Guidance:
5. If Adobe Reader version supports patching, apply the latest available security updates immediately
6. For systems where patches are unavailable, evaluate upgrading to current Adobe Reader versions (2024+)
7. For legacy systems that cannot be patched, implement compensating controls

Compensating Controls (if patching unavailable):
8. Deploy application whitelisting to restrict Adobe Reader execution
9. Implement sandboxing solutions for PDF processing (isolated virtual machines or containerized environments)
10. Use PDF conversion tools (LibreOffice, online converters) to convert PDFs to safer formats before opening
11. Restrict Adobe Reader to read-only mode where possible
12. Implement email gateway controls to scan and strip potentially malicious PDF content

Detection Rules:
13. Monitor for Adobe Reader crashes or unexpected terminations (heap overflow indicators)
14. Alert on Adobe Reader process spawning child processes (cmd.exe, powershell.exe)
15. Track file access patterns for suspicious PDF file modifications
16. Log all PDF file opens from external/untrusted sources
17. Implement YARA rules to detect malformed PDF structures targeting this vulnerability

Discontinuation Path:
18. For non-critical systems, evaluate discontinuing Adobe Reader in favor of alternative PDF viewers (Foxit Reader, PDF-XChange, open-source alternatives)
19. Document business justification for any systems that must retain Adobe Reader
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. إجراء جرد عاجل لجميع تثبيتات Adobe Acrobat و Reader عبر المنظمة، مع إعطاء الأولوية للأنظمة الحرجة والتطبيقات التي تواجه المستخدمين
2. تعطيل أو تقييد معالجة ملفات PDF من مصادر غير موثوقة فوراً
3. تنفيذ عناصر تحكم على مستوى الشبكة لحظر تنزيلات PDF من مصادر خارجية حيث يكون ذلك ممكناً من الناحية التشغيلية
4. تعطيل تنفيذ JavaScript في Adobe Reader (تحرير > التفضيلات > JavaScript > تعطيل JavaScript)

إرشادات التصحيح:
5. إذا كان إصدار Adobe Reader يدعم التصحيح، قم بتطبيق أحدث تحديثات الأمان المتاحة فوراً
6. بالنسبة للأنظمة التي لا تتوفر لها تصحيحات، قيّم الترقية إلى إصدارات Adobe Reader الحالية (2024+)
7. بالنسبة للأنظمة القديمة التي لا يمكن تصحيحها، قم بتنفيذ عناصر تحكم تعويضية

عناصر التحكم التعويضية:
8. نشر قائمة بيضاء للتطبيقات لتقييد تنفيذ Adobe Reader
9. تنفيذ حلول الحماية الرملية لمعالجة PDF (آلات افتراضية معزولة أو بيئات حاوية)
10. استخدام أدوات تحويل PDF (LibreOffice، محولات عبر الإنترنت) لتحويل ملفات PDF إلى تنسيقات أكثر أماناً
11. تقييد Adobe Reader إلى وضع القراءة فقط حيث أمكن
12. تنفيذ عناصر تحكم بوابة البريد الإلكتروني لفحص وإزالة محتوى PDF الضار المحتمل

قواعد الكشف:
13. مراقبة أعطال Adobe Reader أو الإنهاء غير المتوقع (مؤشرات تجاوز الكومة)
14. التنبيه على عملية Adobe Reader التي تولد عمليات فرعية (cmd.exe، powershell.exe)
15. تتبع أنماط الوصول إلى الملفات للتعديلات المريبة على ملفات PDF
16. تسجيل جميع فتحات ملفات PDF من مصادر خارجية/غير موثوقة
17. تنفيذ قواعد YARA للكشف عن هياكل PDF المشوهة التي تستهدف هذه الثغرة

مسار الإيقاف:
18. بالنسبة للأنظمة غير الحرجة، قيّم إيقاف Adobe Reader لصالح عارضات PDF بديلة (Foxit Reader، PDF-XChange، بدائل مفتوحة المصدر)
19. توثيق المبرر التجاري لأي أنظمة يجب أن تحتفظ بـ Adobe Reader
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies (vulnerability management) A.8.1.1 - User Endpoint Devices (secure configuration) A.8.1.3 - Mobile Devices (application security) A.8.2.1 - User Access Management (principle of least privilege) A.8.3.1 - Access Control (restriction of access to resources)
🔵 SAMA CSF
ID.RA-1 - Asset Management (inventory of software) PR.IP-1 - Security Policy and Process (vulnerability management) PR.IP-12 - Software Security (secure development and patching) DE.CM-8 - Vulnerability Scans (detection of unpatched systems) RS.MI-2 - Incident Mitigation (containment of compromised systems)
🟡 ISO 27001:2022
A.12.2.1 - Controls against malware (application security) A.12.6.1 - Management of technical vulnerabilities (patch management) A.14.2.1 - Secure development policy (secure coding practices) A.14.2.5 - Secure development environment (testing and validation)
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches and updates (timely patching) Requirement 6.5.1 - Injection flaws (buffer overflow prevention) Requirement 11.2 - Vulnerability scanning (detection of unpatched systems)
🔗 References & Sources 0
No references.
📊 CVSS Score
9.8
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.8
EPSS88.07%
Exploit No
Patch ✗ No
CISA KEV🇺🇸 Yes
Published 2026-05-20
Source Feed cisa_kev
🇸🇦 Saudi Risk Score
8.5
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev cisa exploit-known
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