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Vulnerabilities

CVE-2026-42831

High
CWE-122 — Weakness Type
Published: May 12, 2026  ·  Modified: May 19, 2026  ·  Source: NVD
CVSS v3
7.8
🔗 NVD Official
📄 Description (English)

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

🤖 AI Executive Summary

A heap-based buffer overflow vulnerability in Microsoft Office (CVE-2026-42831) allows local attackers to execute arbitrary code with CVSS score 7.8. Organizations using Microsoft Office must apply security patches immediately to prevent potential system compromise.

📄 Description (Arabic)

تتعلق هذه الثغرة بتجاوز المخزن المؤقت على الكومة في Microsoft Office مما يسمح بتنفيذ أكواد عشوائية محلياً. يؤثر هذا على جميع المنظمات التي تعتمد على Microsoft Office في عملياتها اليومية. يتطلب الإصلاح تطبيق التحديثات الأمنية الفورية من Microsoft.

🤖 ملخص تنفيذي (AI)

ثغرة تجاوز المخزن المؤقت في Microsoft Office تسمح للمهاجمين المحليين بتنفيذ أكواد عشوائية برصيد CVSS 7.8. يجب على المنظمات التي تستخدم Microsoft Office تطبيق تصحيحات الأمان فوراً لمنع اختراق النظام المحتمل.

🤖 AI Intelligence Analysis Analyzed: May 19, 2026 17:18
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
banking government healthcare telecom energy
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.0
/ 10.0
🔧 Remediation Steps (English)
Apply Microsoft security patches immediately. Update all Microsoft Office installations to the latest patched version. Implement application whitelisting and restrict local user privileges. Monitor systems for suspicious Office process behavior and unauthorized code execution attempts.
🔧 خطوات المعالجة (العربية)
طبق تصحيحات أمان Microsoft فوراً. حدّث جميع تثبيتات Microsoft Office إلى أحدث إصدار معدل. طبق قوائم التطبيقات البيضاء وقيّد امتيازات المستخدمين المحليين. راقب الأنظمة للكشف عن سلوك عمليات Office المريبة ومحاولات تنفيذ الأكواد غير المصرح بها.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A1 A2 A3
🔵 SAMA CSF
ID.BE-1 PR.IP-1 PR.IP-2 DE.CM-1
🟡 ISO 27001:2022
A.12.2.1 A.12.6.1 A.14.2.1
📦 Affected Products / CPE 3 entries
microsoft:office
microsoft:office:2021
microsoft:office:2024
📊 CVSS Score
7.8
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.8
CWECWE-122
EPSS0.06%
Exploit No
Patch ✗ No
Published 2026-05-12
Source Feed nvd
🇸🇦 Saudi Risk Score
8.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-122
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