CVE-2026-50522

Microsoft SharePoint Vulnerability

Microsoft SharePoint contains a deserialization of untrusted data vulnerability which could allow an unauthorized attacker to execute code over a network.

CVSS Score

9.8

CRITICAL

Published

22 Jul 2026 00:00

Modified

N/A

Vendor

Microsoft

Product

SharePoint

Source

CIRCL

Affected Versions

Fix Vendor Patch / Mitigation Available

Weaknesses (CWE)

CWE-502

References

nvd.nist.gov /vuln/detail/CVE-2026-50522 cve.circl.lu /cve/CVE-2026-50522 cve.mitre.org /cgi-bin/cvename.cgi vuldb.com /

Affected Systems

Microsoft

SharePoint

Microsoft

Windows Ancillary Function Driver For WinSock

SharePoint

Active Directory Federation Services

SharePoint Server

Windows

DirectX

Internet Explorer

Defender

Microsoft

Office

Visual Basic For Applications (VBA)

External Links

NVD Database CIRCL CISA KEV

KEV Status

Known Exploited Vulnerability