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CVE-2026-56164: Microsoft SharePoint Server

EPSS1.0%No. 1675 of 1739 in KEV
CVE year2026listed the same year
Same vendor in KEV389
Same product5
FieldValue
VendorMicrosoft
ProductSharePoint Server
NameMicrosoft SharePoint Server Missing Authentication for Critical Function Vulnerability
Added to KEV2026-07-14
US federal due date2026-07-17
Ransomware useUnknown
CWECWE-306

CISA description

Microsoft SharePoint contains a missing authentication for critical function vulnerability that allows an unauthorized attacker to elevate privileges over a network.

Other entries for this product

CVEVendor / productAddedEPSSRansomware
CVE-2026-45659Microsoft SharePoint Server2026-07-012.7%Known
CVE-2026-32201Microsoft SharePoint Server2026-04-1443.3%Unknown
CVE-2023-24955Microsoft SharePoint Server2024-03-2684.9%Known
CVE-2023-29357Microsoft SharePoint Server2024-01-1099.9%Known

NVD — CVE-2026-56164

Data from CISA's Known Exploited Vulnerabilities (KEV) catalog. EPSS is FIRST's estimated probability of exploitation activity in the next 30 days, refreshed weekly. Always follow the vendor's official guidance.
About this page

A Microsoft SharePoint Server vulnerability added to CISA's Known Exploited Vulnerabilities catalog on 2026-07-14.