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Global vulnerability Multiple sectors CRITICAL 23m Global vulnerability Information Technology / Software Infrastructure CRITICAL 25m Global data_breach Healthcare CRITICAL 40m Global data_breach Mobile Technology / Consumer Electronics HIGH 1h Global ransomware Cybersecurity Services / Multiple Sectors CRITICAL 1h Global apt Cryptocurrency and Blockchain CRITICAL 1h Global malware Financial Services, Mobile Payments HIGH 2h Global vulnerability Government and Critical Infrastructure CRITICAL 5h Global apt Cryptocurrency and Blockchain CRITICAL 13h Global malware Financial Services / Cryptocurrency CRITICAL 13h Global vulnerability Multiple sectors CRITICAL 23m Global vulnerability Information Technology / Software Infrastructure CRITICAL 25m Global data_breach Healthcare CRITICAL 40m Global data_breach Mobile Technology / Consumer Electronics HIGH 1h Global ransomware Cybersecurity Services / Multiple Sectors CRITICAL 1h Global apt Cryptocurrency and Blockchain CRITICAL 1h Global malware Financial Services, Mobile Payments HIGH 2h Global vulnerability Government and Critical Infrastructure CRITICAL 5h Global apt Cryptocurrency and Blockchain CRITICAL 13h Global malware Financial Services / Cryptocurrency CRITICAL 13h Global vulnerability Multiple sectors CRITICAL 23m Global vulnerability Information Technology / Software Infrastructure CRITICAL 25m Global data_breach Healthcare CRITICAL 40m Global data_breach Mobile Technology / Consumer Electronics HIGH 1h Global ransomware Cybersecurity Services / Multiple Sectors CRITICAL 1h Global apt Cryptocurrency and Blockchain CRITICAL 1h Global malware Financial Services, Mobile Payments HIGH 2h Global vulnerability Government and Critical Infrastructure CRITICAL 5h Global apt Cryptocurrency and Blockchain CRITICAL 13h Global malware Financial Services / Cryptocurrency CRITICAL 13h
Vulnerabilities

CVE-2023-21529

Critical 🇺🇸 CISA KEV
Published: Apr 13, 2026  ·  Source: CISA_KEV
CVSS v3
9.8
🔗 NVD Official
📄 Description (English)

Microsoft Exchange Server — CVE-2023-21529
Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.

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: 2026-04-27

🤖 AI Executive Summary

CVE-2023-21529 is a critical remote code execution vulnerability in Microsoft Exchange Server that exploits unsafe deserialization of untrusted data, requiring authenticated access. Organizations must apply vendor mitigations immediately or discontinue use of affected systems.

📄 Description (Arabic)

يحتوي Microsoft Exchange Server على ثغرة في معالجة البيانات المسلسلة (Deserialization) تسمح لمهاجم مصرح له بتنفيذ أكواد بعيدة على الخادم. تتطلب الثغرة وصول مصرح به لكن تؤدي إلى تأثير حرج على سرية وتكامل البيانات. يجب تطبيق التصحيحات الأمنية من Microsoft بشكل عاجل.

🤖 ملخص تنفيذي (AI)

هذا الثغرة الحرجة في Microsoft Exchange Server تسمح لمهاجم مصرح له بتنفيذ أكواد بعيدة من خلال معالجة بيانات غير موثوقة بشكل غير آمن. يجب على المنظمات تطبيق التصحيحات الفورية أو إيقاف استخدام الأنظمة المتأثرة.

🤖 AI Intelligence Analysis Analyzed: Apr 14, 2026 03:32
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
banking telecom energy government healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
10.0
/ 10.0
🔧 Remediation Steps (English)
Apply Microsoft security updates immediately for all affected Exchange Server versions. Implement network segmentation to restrict Exchange Server access. Enable multi-factor authentication for all administrative accounts. Monitor for suspicious deserialization activities and authentication attempts. If patches are unavailable, discontinue use or isolate affected systems from production networks.
🔧 خطوات المعالجة (العربية)
طبق تحديثات أمان Microsoft فوراً على جميع إصدارات Exchange Server المتأثرة. طبق تقسيم الشبكة لتقييد الوصول إلى Exchange Server. فعّل المصادقة متعددة العوامل لجميع الحسابات الإدارية. راقب الأنشطة المريبة المتعلقة بمعالجة البيانات والمحاولات الاستيثنائية. إذا لم تتوفر التصحيحات، أوقف الاستخدام أو عزل الأنظمة المتأثرة عن شبكات الإنتاج.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.1.1.1 A.2.1.1 A.2.2.1 A.3.1.1 A.4.1.1
🔵 SAMA CSF
ID.AM-2 PR.DS-1 PR.IP-1 DE.CM-1 RS.MI-2
🟡 ISO 27001:2022
A.12.2.1 A.12.6.1 A.14.2.1 A.18.1.3
🔗 References & Sources 0
No references.
📊 CVSS Score
9.8
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.8
EPSS35.02%
Exploit No
Patch ✗ No
CISA KEV🇺🇸 Yes
Published 2026-04-13
Source Feed cisa_kev
🇸🇦 Saudi Risk Score
10.0
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev cisa exploit-known
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