CVE-2026-105599

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Microsoft Office PowerPoint

Publication date: 2026-10-13

Last updated on: 2026-10-15

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-15

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-105599

EUVD

EUVD-2026-99059

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	microsoft_365	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_2024	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This is a heap-based buffer overflow vulnerability in Microsoft Office PowerPoint. It allows an unauthorized attacker to execute arbitrary code remotely over a network by exploiting a flaw in memory handling.

Detection Guidance

Detecting this vulnerability requires checking for outdated or vulnerable versions of Microsoft Office PowerPoint. Use Microsoft Update or Windows Update to ensure all Office components are patched. Monitor network traffic for suspicious PowerPoint file transfers or unusual execution patterns.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially stealing data, installing malware, or taking control of your computer. It requires user interaction, such as opening a specially crafted PowerPoint file.

Compliance Impact

This vulnerability allows remote code execution via a heap-based buffer overflow in Microsoft Office PowerPoint. Such vulnerabilities can lead to unauthorized access to sensitive data, which may violate compliance requirements under GDPR (data protection) and HIPAA (health information security).

Mitigation Strategies

Apply the latest security updates from Microsoft for PowerPoint and Office products. Disable file sharing and network access to PowerPoint files until patched. Monitor network traffic for unusual PowerPoint file activity.

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