Quick answers
- Is CVE-2026-102864 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-102864 being exploited in the wild.
- How severe is CVE-2026-102864?
- Medium severity, with a CVSS score of 4.6, published 13 October 2026.
- Which products and versions are affected?
- Microsoft Office SharePoint.
- Is there a fix for CVE-2026-102864?
- 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-2026-102864 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-102864?
- Check whether you run Microsoft Office SharePoint or Microsoft SharePoint Server. 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
This is a reflected XSS vulnerability in SharePoint's web page generation that fails to properly neutralize user-controlled input. An authorized attacker can craft a malicious link containing script code that executes in the context of another user's browser session when they visit it, requiring the victim to interact with a social-engineered link. Successful exploitation allows spoofing and potential session hijacking.
Affected products
- Microsoft Office SharePoint
Timeline
- 2026-10-13: disclosed