CVE-2026-48580

Analyzed Analyzed - Analysis Complete

Untrusted Pointer Dereference in Microsoft Office Excel

Publication date: 2026-07-14

Last updated on: 2026-07-15

Assigner: Microsoft Corporation

Description

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-14

Last Modified

2026-07-15

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-48580

EUVD

EUVD-2026-44154

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	excel	2016
microsoft	excel	2016
microsoft	office_2019	*
microsoft	office_2019	*
microsoft	microsoft_365	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_online_server	to 16.0.10417.20175 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-822	The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is an untrusted pointer dereference in Microsoft Office Excel. It allows an unauthorized attacker to disclose information locally by exploiting how Excel handles pointers.

Impact Analysis

This vulnerability could allow an attacker to access sensitive information stored in Excel files on your local system. It does not require user interaction but needs local access to the machine.

Compliance Impact

This vulnerability allows unauthorized local information disclosure in Microsoft Office Excel, which could lead to unauthorized access to sensitive data. This may impact compliance with GDPR (potential data breach) and HIPAA (unauthorized disclosure of protected health information).

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Excel as soon as they become available to patch the untrusted pointer dereference vulnerability.

Hi! I’m here to help you understand CVE-2026-48580. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70