# CVE-2026-69922: Microsoft Excel out-of-bounds read information disclosure

Source: https://junglewise.ai/threats/cve-2026-69922-out-of-bounds-read-in-microsoft-office-excel-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-69922 · Severity: medium · CVSS 6.5 · Published 2026-10-13

Microsoft Excel contains an out-of-bounds read vulnerability that allows an attacker to disclose sensitive information over the network. An attacker can exploit this flaw by sending a specially crafted file to a user, potentially exposing confidential data such as spreadsheet contents or memory contents from the Excel process.

Technologies: [Microsoft 365 Apps](https://junglewise.ai/threats/technologies/365-apps), [Microsoft Excel](https://junglewise.ai/threats/technologies/excel), [Microsoft Office 2021](https://junglewise.ai/threats/technologies/office-2021), [Microsoft Office 2024](https://junglewise.ai/threats/technologies/office-2024). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69922 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69922 being exploited in the wild.

**How severe is CVE-2026-69922?** Medium severity, with a CVSS score of 6.5, published 13 October 2026.

**Which products and versions are affected?** Microsoft Excel.

**Is there a fix for CVE-2026-69922?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-69922 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-69922?** Check whether you run Microsoft 365 Apps, Microsoft Excel, Microsoft Office 2021 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An out-of-bounds read vulnerability in Microsoft Excel allows an attacker to read memory beyond allocated buffer boundaries. The flaw is triggered via a malicious Excel file sent over the network, requiring user interaction to open the file, and results in information disclosure without authentication. The attack vector is network-based with user interaction required (UI:R).

## Affected products

- Microsoft Excel

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69922](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69922)

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