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Vulnerabilities

CVE-2026-34339

Medium
CWE-476 — Weakness Type
Published: May 12, 2026  ·  Modified: May 15, 2026  ·  Source: NVD
CVSS v3
5.5
🔗 NVD Official
📄 Description (English)

Null pointer dereference in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to deny service locally.

🤖 AI Executive Summary

A null pointer dereference vulnerability in Windows LDAP allows authorized attackers to cause denial of service on local systems. The vulnerability requires valid credentials and local access to exploit.

📄 Description (Arabic)

ثغرة إلغاء مؤشر فارغ في بروتوكول LDAP بنظام Windows تسمح للمهاجمين المصرحين بالوصول المحلي بإنكار الخدمة. تؤثر الثغرة على أنظمة Windows التي تستخدم خدمات LDAP وتتطلب بيانات اعتماد صحيحة للاستغلال.

🤖 ملخص تنفيذي (AI)

ثغرة إلغاء مؤشر فارغ في بروتوكول LDAP في Windows تسمح للمهاجمين المصرحين بإنكار الخدمة محليًا. تتطلب الثغرة بيانات اعتماد صحيحة والوصول المحلي للاستغلال.

🤖 AI Intelligence Analysis Analyzed: May 25, 2026 21:16
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
banking telecom government healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
5.0
/ 10.0
🔧 Remediation Steps (English)
Apply Windows security updates immediately. Implement strict access controls limiting LDAP service access to authorized personnel only. Monitor LDAP service logs for suspicious activities. Restrict local administrative privileges and enforce principle of least privilege.
🔧 خطوات المعالجة (العربية)
تطبيق تحديثات أمان Windows فورًا. تنفيذ ضوابط وصول صارمة تحد من الوصول لخدمة LDAP للموظفين المصرحين فقط. مراقبة سجلات خدمة LDAP للأنشطة المريبة. تقييد امتيازات المسؤول المحلي وتطبيق مبدأ أقل امتياز.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1 5.2 5.3
🔵 SAMA CSF
ID.AM-2 PR.AC-1 PR.AC-4
🟡 ISO 27001:2022
A.9.1.1 A.9.2.1 A.9.4.3
📦 Affected Products / CPE 23 entries
microsoft:windows_10_1607
microsoft:windows_10_1607
microsoft:windows_10_1809
microsoft:windows_10_1809
microsoft:windows_10_21h2
microsoft:windows_10_21h2
microsoft:windows_10_21h2
microsoft:windows_10_22h2
microsoft:windows_10_22h2
microsoft:windows_10_22h2
microsoft:windows_11_23h2
microsoft:windows_11_23h2
microsoft:windows_11_24h2
microsoft:windows_11_24h2
microsoft:windows_11_25h2
microsoft:windows_11_25h2
microsoft:windows_11_26h1
microsoft:windows_11_26h1
microsoft:windows_server_2016
microsoft:windows_server_2019
microsoft:windows_server_2022
microsoft:windows_server_2022_23h2
microsoft:windows_server_2025
📊 CVSS Score
5.5
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityN — None / Network
AvailabilityH — High
📋 Quick Facts
Severity Medium
CVSS Score5.5
CWECWE-476
EPSS0.04%
Exploit No
Patch ✗ No
Published 2026-05-12
Source Feed nvd
🇸🇦 Saudi Risk Score
5.0
/ 10.0 — Saudi Risk
Priority: MEDIUM
🏷️ Tags
CWE-476
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