Quick answers
- Is CVE-2026-68816 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-68816 being exploited in the wild.
- How severe is CVE-2026-68816?
- High severity, with a CVSS score of 7.8, published 11 August 2026.
- Which products and versions are affected?
- Microsoft Office Excel.
- Is there a fix for CVE-2026-68816?
- 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-2026-68816 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-68816?
- Check whether you run Microsoft Office 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 stack-based buffer overflow exists in Microsoft Office Excel's file parsing logic. The vulnerability occurs when Excel processes specially crafted input that exceeds buffer boundaries, allowing an attacker to overwrite stack memory. Exploitation requires local access and user interaction (opening a malicious Excel file). A successful exploit grants code execution with the privileges of the user running Excel. Microsoft has released patches to address this issue.
Affected products
- Microsoft Office Excel
Timeline
- 2026-08-11: disclosed