CVE-2026-66808
CVE CVE-2026-66808EUVD EUVD-2026-56750Published 2026-08-11T17:07:03.000ZLast changed 2026-08-19T17:19:31.000ZCVSS 8.8
What the advisory describes
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Microsoft — Microsoft SharePoint Enterprise Server 2016 16.0.0 <16.0.5565.1001
- Microsoft — Microsoft SharePoint Server 2019 16.0.0 <16.0.10417.20198
- Microsoft — Microsoft SharePoint Server Subscription Edition 16.0.0 <16.0.19725.20522
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Microsoft — SharePoint Enterprise Server
- Microsoft — SharePoint Server
Does this concern one of your customers?
This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.
Try it for 28 daysPatchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.