Quick answers
- Is CVE-2026-68794 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-68794 being exploited in the wild.
- How severe is CVE-2026-68794?
- High severity, with a CVSS score of 7.8, published 11 August 2026.
- Which products and versions are affected?
- Microsoft Excel.
- Is there a fix for CVE-2026-68794?
- 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-2026-68794 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-68794?
- Check whether you run Microsoft Excel. 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 Excel's memory handling during file processing. An attacker with local system access can exploit this vulnerability by crafting a malicious Excel file that, when opened by a user or processed by the application, overflows a heap buffer and executes arbitrary code with the privileges of the user running Excel. No network-based exploitation is possible; physical access or local file placement is required. The vulnerability has not been observed in active exploitation in the wild as of the publication date.
Affected products
- Microsoft Excel
Timeline
- 2026-08-11: disclosed