Quick answers
- Is CVE-2026-64920 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-64920 being exploited in the wild.
- How severe is CVE-2026-64920?
- High severity, with a CVSS score of 7.8, published 11 August 2026.
- Which products and versions are affected?
- Microsoft Office Access.
- Is there a fix for CVE-2026-64920?
- 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-2026-64920 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-64920?
- Check whether you run Microsoft Office Access. 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 exists in Microsoft Office Access that can be exploited through a maliciously crafted database file or input. The vulnerability requires local access to the system and user interaction to open a malicious file. Successful exploitation allows an attacker to execute arbitrary code in the context of the user running Access, potentially leading to system compromise. A patch is available through Microsoft Security Updates.
Affected products
- Microsoft Office Access
Timeline
- 2026-08-11: disclosed