CVE-2026-56164

9.8 criticalKEVEPSS 1.0%

Critical (9.8) in Microsoft SharePoint Server. In CISA KEV since 2026-07-14. EPSS 1.0% chance of exploitation in the next 30 days.

Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 63% of CVEs (scores of 2026-10-31)
CISA KEV: listed 2026-07-14, due 2026-07-17
CWE: CWE-306
Published: 2026-07-14
Modified: 2026-07-14
Record from: the NVD, synced 2026-10-19