# CVE-2026-102849: Microsoft Office Access heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-102849-heap-based-buffer-overflow-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-2026-102849 · Severity: high · CVSS 8.8 · Published 2026-10-13

Microsoft Office Access, a database management application widely used in enterprise environments, contains a heap-based buffer overflow vulnerability that allows an attacker to execute arbitrary code remotely. An attacker could exploit this flaw by sending a specially crafted file or network request, potentially leading to unauthorized access, data theft, or system compromise without requiring user credentials.

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-2026-102849 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-102849 being exploited in the wild.

**How severe is CVE-2026-102849?** 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-2026-102849?** 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-2026-102849 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-102849?** 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

A heap-based buffer overflow in Microsoft Office Access allows remote code execution without authentication. The vulnerability is exploitable over the network, and attackers can trigger it by delivering malicious input that overflows a heap buffer, gaining the ability to execute arbitrary code with the privileges of the Access process.

## Affected products

- Microsoft Office Access

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102849](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102849)

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