Quick answers
- Is CVE-2026-105013 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-105013 being exploited in the wild.
- How severe is CVE-2026-105013?
- High severity, with a CVSS score of 7.4, published 13 October 2026.
- Which products and versions are affected?
- Microsoft Office SharePoint.
- Is there a fix for CVE-2026-105013?
- 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-2026-105013 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-105013?
- 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
The vulnerability exists in Microsoft Office SharePoint's handling of serialized objects, where untrusted data is deserialized without proper validation. An authenticated attacker can exploit this flaw by sending a specially crafted serialized payload over the network to trigger remote code execution. The attack requires valid credentials but no additional user interaction.
Affected products
- Microsoft Office SharePoint
Timeline
- 2026-10-13: disclosed