Quick answers
- Is CVE-2026-105596 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-105596 being exploited in the wild.
- How severe is CVE-2026-105596?
- 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-2026-105596?
- 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-2026-105596 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-105596?
- 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
The vulnerability is a heap-based buffer overflow in Microsoft Office Access that can be triggered by processing a malformed input, allowing remote code execution without authentication. An attacker needs only network access to deliver a malicious payload; no user interaction beyond opening a file is required. The overflow enables arbitrary code execution with the privileges of the Office process.
Affected products
- Microsoft Office Access