Description

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

INFO

Published Date :

2026-02-10T17:51:37.088Z

Last Modified :

2026-02-11T19:49:02.024Z

Source :

microsoft
AFFECTED PRODUCTS

The following products are affected by CVE-2026-21261 vulnerability.

Vendors Products
Microsoft
  • 365 Apps
  • Excel
  • Excel 2016
  • Office
  • Office 2019
  • Office 2021
  • Office 2024
  • Office Long Term Servicing Channel
  • Office Macos 2021
  • Office Macos 2024
  • Office Online Server
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21261.

URL Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21261 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact