CVE-2026-21261
Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Microsoft Excel Causes Local Information Disclosure

Publication date: 2026-02-10

Last updated on: 2026-02-11

Assigner: Microsoft Corporation

Description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

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Meta Information

Published
2026-02-10
Last Modified
2026-02-11
Generated
2026-07-27
AI Q&A
2026-02-10
EPSS Evaluated
2026-07-25
NVD
CVE-2026-21261
EUVD
EUVD-2026-7330

Affected Vendors & Products

Showing 13 associated CPEs
Vendor Product Version / Range
microsoft 365_apps *
microsoft 365_apps *
microsoft excel 2016
microsoft excel 2016
microsoft office_long_term_servicing_channel 2021
microsoft office 2019
microsoft office 2019
microsoft office_long_term_servicing_channel 2024
microsoft office_long_term_servicing_channel 2024
microsoft office_long_term_servicing_channel 2024
microsoft office_long_term_servicing_channel 2024
microsoft office_long_term_servicing_channel 2024
microsoft office_online_server to 16.0.10417.20097 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability is an out-of-bounds read in Microsoft Office Excel that allows an unauthorized attacker to disclose information locally.

Detection Guidance

I don't know

Impact Analysis

The impact of this vulnerability is information disclosure, meaning an attacker could gain access to sensitive information on the affected system without authorization.

Compliance Impact

I don't know

Mitigation Strategies

I don't know

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