CVE-2026-26144
Received Received - Intake
Cross-Site Scripting in Microsoft Excel Enables Network Data Disclosure

Publication date: 2026-03-10

Last updated on: 2026-03-13

Assigner: Microsoft Corporation

Description
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
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Meta Information
Published
2026-03-10
Last Modified
2026-03-13
Generated
2026-06-16
AI Q&A
2026-03-10
EPSS Evaluated
2026-06-14
NVD
CVE-2026-26144
EUVD
EUVD-2026-10701
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
microsoft 365_apps *
microsoft 365_apps *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is an improper neutralization of input during web page generation, also known as cross-site scripting (XSS), in Microsoft Office Excel.

It allows an unauthorized attacker to disclose information over a network by exploiting how Excel processes input when generating web pages.

Impact Analysis

This vulnerability can lead to information disclosure, meaning an attacker could gain access to sensitive information without authorization.

Since the vulnerability can be exploited remotely over a network without user interaction or privileges, it poses a significant security risk.

Compliance Impact

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Detection Guidance

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