Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 | 16.0.0 – < 16.0.5561.1001 | 16.0.5561.1001 |
| Microsoft | Microsoft SharePoint Server 2019 | 16.0.0 – < 16.0.10417.20175 | 16.0.10417.20175 |
| Microsoft | Microsoft SharePoint Server Subscription Edition | 16.0.0 – < 16.0.19725.20434 | 16.0.19725.20434 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 5 repositories
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4minx/CVE-2026-50522 ★ 44 · Jul 25, 2026
CVE-2026-50522 PoC
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WismanSec/sharepoint-2026-poc ★ 2 · Jul 26, 2026
PoC, IOCs, and detection logic for the SharePoint /_trust WS-Federation BinaryFormatter deserialization chain. Lab reconstruction covering unauthenticated RCE, in-process machine key theft, and the a…
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darses/CVE-2026-50522 ★ 0 · Jul 28, 2026
Microsoft SharePoint CVE-2026-50522
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ChPratik/CVE-2026-50522 ★ 0 · Jul 27, 2026
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
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HORKimhab/CVE-2026-50522 ★ 0 · Jul 22, 2026
CVE-2026-50522
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- WID-SEC-2026-2317 Microsoft Office Produkte: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 12, 2026
- NCSC-2026-0237 Kwetsbaarheden verholpen in Microsoft Office NCSC-NL (Netherlands) · Jul 21, 2026
- MSRC-CVE-2026-50522 Microsoft SharePoint Remote Code Execution Vulnerability Microsoft Security Response Center · Jul 14, 2026
References
- Microsoft SharePoint Remote Code Execution Vulnerability vendor-advisory patch