CVE-2026-108454

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Microsoft PowerPoint Information Disclosure Vulnerability

Publication date: 2026-10-15

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Buffer over-read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-15

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-16

EPSS Evaluated

2026-10-18

NVD

CVE-2026-108454

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Microsoft	365 Apps for Enterprise 16.0.1
Microsoft	Microsoft	Office 365 for Mac 1.0.0
Microsoft	Microsoft	Office LTSC 2021 16.0.1
Microsoft	Microsoft	Office LTSC 2024 16.0.0
Microsoft	Microsoft	Office LTSC for Mac 2021 16.0.1
Microsoft	Microsoft	Office LTSC for Mac 2024 16.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-126	The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Attack-Flow Graph

Executive Summary

This is an information disclosure vulnerability in Microsoft Office PowerPoint. It allows unauthorized access to sensitive data when a user opens a specially crafted file. The vulnerability has a CVSS score of 6.5, indicating moderate severity.

Detection Guidance

This vulnerability involves a buffer over-read in Microsoft Office PowerPoint that could allow information disclosure. Detection typically requires monitoring for unusual PowerPoint file processing or network traffic anomalies. Check for unexpected crashes or memory dumps when opening PowerPoint files. Use network monitoring tools to inspect traffic for suspicious PowerPoint-related data exfiltration attempts.

Impact Analysis

An attacker could exploit this to read files on your system that they should not have access to. This might include confidential documents, personal information, or other sensitive data stored on your computer.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating GDPR's data protection requirements or HIPAA's privacy rules. Organizations may face compliance penalties if this vulnerability results in data breaches.

Mitigation Strategies

Apply the latest security updates from Microsoft for PowerPoint and Office products. Disable macros in PowerPoint files if not required. Monitor for suspicious PowerPoint files received via email or other sources.

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