Quick answers
- Is CVE-2026-118725 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-118725 being exploited in the wild.
- How severe is CVE-2026-118725?
- High severity, with a CVSS score of 8.8, published 10 November 2026.
- Which products and versions are affected?
- Microsoft Office Excel.
- Is there a fix for CVE-2026-118725?
- 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-2026-118725 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-118725?
- 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
An out-of-bounds read flaw in Microsoft Office Excel fails to properly validate memory access when processing certain file inputs, allowing an attacker to read data beyond allocated buffer boundaries. Exploitation requires network access and a user to open a malicious file, but does not require prior authentication. Successful exploitation grants privilege escalation on the affected system.
Affected products
- Microsoft Office Excel
Timeline
- 2026-11-10: disclosed