# CVE-2026-105595: Microsoft Office Access out-of-bounds read

Source: https://junglewise.ai/threats/cve-2026-105595-out-of-bounds-read-in-microsoft-office-access-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-2026-105595 · Severity: high · CVSS 8.8 · Published 2026-10-13

Microsoft Office Access contains an out-of-bounds read vulnerability that could allow an attacker to execute arbitrary code on a user's computer. An attacker can exploit this by sending a specially crafted Office document over the network, potentially leading to full system compromise without requiring any user privileges.

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

## Quick answers

**Is CVE-2026-105595 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105595 being exploited in the wild.

**How severe is CVE-2026-105595?** High severity, with a CVSS score of 8.8, published 13 October 2026.

**Which products and versions are affected?** Microsoft Office Access.

**Is there a fix for CVE-2026-105595?** 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-2026-105595 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-105595?** Check whether you run Microsoft 365 Apps, Microsoft Office 2021, Microsoft Office 2024 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 Office Access allows memory disclosure and potential code execution. The vulnerability is triggered when processing malformed Office files delivered over the network. Exploitation requires no authentication or user interaction beyond opening a malicious file.

## Affected products

- Microsoft Office Access

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105595](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105595)

## Related threats

- [Microsoft Office Access heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-111305-heap-based-buffer-overflow-in-microsoft-office-access-allows-an)
- [Microsoft Office Access heap buffer overflow](https://junglewise.ai/threats/cve-2026-111301-heap-based-buffer-overflow-in-microsoft-office-access-allows-an)
- [Microsoft Office Access heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-110060-heap-based-buffer-overflow-in-microsoft-office-access-allows-an)
- [Microsoft Office Access heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-110059-heap-based-buffer-overflow-in-microsoft-office-access-allows-an)
- [Microsoft Office Access heap buffer overflow](https://junglewise.ai/threats/cve-2026-110058-heap-based-buffer-overflow-in-microsoft-office-access-allows-an)