Quick answers
- Is CVE-2026-108446 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-108446 being exploited in the wild.
- How severe is CVE-2026-108446?
- High severity, with a CVSS score of 8.8, published 15 October 2026.
- Which products and versions are affected?
- Microsoft Office Excel.
- Is there a fix for CVE-2026-108446?
- 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-2026-108446 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-108446?
- 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 use-after-free flaw in Microsoft Office Excel's memory management allows code execution when processing maliciously crafted spreadsheet files. The vulnerability is accessible over the network and requires user interaction (opening the malicious file). Successful exploitation grants arbitrary code execution in the context of the user running Excel.
Affected products
- Microsoft Office Excel
Timeline
- 2026-10-15: disclosed