Skip to content
OpenAdvisories
Critical · 9.1 Known exploited Scanner template Public exploit CVE-2026-55040 EUVD-2026-44211GHSA-grxw-7cvc-96rv

Microsoft SharePoint Server Security Feature Bypass Vulnerability

Published Jul 14, 2026 · Updated Nov 10, 2026 · Assigned by microsoft

Vendor: Microsoft Product: Microsoft SharePoint Enterprise Server 2016 Product: Microsoft SharePoint Server 2019 Product: Microsoft SharePoint Server Subscription Edition

Description

Weak authentication in Microsoft Office SharePoint allows an unauthorized attacker to bypass a security feature over a network.

Affected products

VendorProductAffectedFixed
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.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 5 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Advisories 3

References