Microsoft SharePoint: Schwachstelle ermöglicht Codeausführung
WID-SEC-2026-1764 · first 02.06.2026 · updated 02.06.2026 · CVSS 8,0
What it is about
Microsoft Sharepoint ist ein Portalsystem für die zentrale Verwaltung von Dokumenten und Anwendungen. Die Inhalte werden u. a. über Webseiten zur Verfügung gestellt. Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Microsoft SharePoint Server ausnutzen, um beliebigen Programmcode auszuführen.
Under what conditions?
Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.
What can happen in the worst case
An attacker could use the vulnerability to
- beliebigen Programmcode auszuführen
Am I affected?
Affected according to the BSI:
- Microsoft SharePoint Server 2019 <16.0.10417.20128
- Microsoft SharePoint Server Subscription Edition <16.0.19725.20280
- Microsoft SharePoint Server 2016 <16.0.5552.1002
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Microsoft SharePoint Server 2019 16.0.10417.20128
- Microsoft SharePoint Server Subscription Edition 16.0.19725.20280
- Microsoft SharePoint Server 2016 16.0.5552.1002
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Microsoft Security Update Guide vom 2026-06-01 msrc.microsoft.com
CVE: CVE-2026-47294
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.