{"id":"CVE-2026-56164","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-56164","summary":"Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.","details":"Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.","published":"2026-07-14T17:17:09.907","modified":"2026-07-14T21:10:41.693","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"epss":{"score":0.26636,"percentile":0.97868,"asOf":"2026-08-27"},"cisaKev":{"dateAdded":"2026-07-14","dueDate":"2026-07-17","knownRansomwareCampaignUse":false},"exploitsKnown":1,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56164"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56164"}],"provenance":{"sources":["OSV.dev","NVD","CISA KEV","FIRST.org (EPSS)"],"lastVerified":"2026-07-14T21:10:41.693"}}