# CVE-2025-59240: Exposure of sensitive information to an unauthorized actor in Microsoft Office Excel allows an unauthorized attacker…

Source: https://junglewise.ai/threats/cve-2025-59240-exposure-of-sensitive-information-to-an-unauthorized-actor-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-11  
License: CC BY 4.0 with a link back

CVE-2025-59240 · Severity: medium · CVSS 5.5 · Published 2025-11-11

Exposure of sensitive information to an unauthorized actor in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Technologies: [Microsoft 365 Apps](https://junglewise.ai/threats/technologies/365-apps), [Microsoft Excel](https://junglewise.ai/threats/technologies/excel), [Microsoft Office](https://junglewise.ai/threats/technologies/office), [Microsoft Office Long Term Servicing Channel](https://junglewise.ai/threats/technologies/office-long-term-servicing-channel). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2025-59240 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-59240 being exploited in the wild.

**How severe is CVE-2025-59240?** Medium severity, with a CVSS score of 5.5, published 11 November 2025.

**Which products and versions are affected?** Microsoft 365 Apps, Microsoft Excel, Microsoft Office, Microsoft Office Long Term Servicing Channel. The advisory does not name versions.

**Is there a fix for CVE-2025-59240?** 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.

**Am I affected by CVE-2025-59240?** Check whether you run Microsoft 365 Apps, Microsoft Excel, Microsoft Office 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.

## Affected products

- Microsoft 365 Apps
- Microsoft Excel
- Microsoft Office
- Microsoft Office Long Term Servicing Channel

## Related threats

- [Microsoft Office Outlook user warning spoofing vulnerability](https://junglewise.ai/threats/cve-2026-124194-microsoft-office-outlook-missing-user-interaction-for)
- [Microsoft Office heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-122198-heap-based-buffer-overflow-in-microsoft-office-allows-an)
- [Microsoft Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-120786-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an)
- [Microsoft Office heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-120003-heap-based-buffer-overflow-in-microsoft-office-allows-an)
- [Microsoft Office UI security feature bypass](https://junglewise.ai/threats/cve-2026-119998-product-ui-does-not-warn-user-of-unsafe-actions-in-microsoft)