{"cve":"CVE-2026-56164","nvd":{"published":"2026-07-14T17:17:09.907","modified":"2026-07-14T21:10:41.693","status":"Analyzed","description":"Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-306"],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56164","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56164"],"products":["microsoft:sharepoint_server"],"source":"nvd","synced_at":"2026-10-19T22:44:02.134301115+00:00"},"epss":{"cve":"CVE-2026-56164","score":0.01011,"percentile":0.63184,"date":"2026-11-01"},"kev":{"cve":"CVE-2026-56164","date_added":"2026-07-14","due_date":"2026-07-17","vendor":"Microsoft","product":"SharePoint Server","known_ransomware":false},"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}