{"id":"CVE-2026-70321","published":"2026-08-11T17:05:23Z","modified":"2026-10-30T17:21:09Z","title":"Microsoft SharePoint Remote Code Execution Vulnerability","vendor":"Microsoft","product":"Microsoft SharePoint Server Subscription Edition","tier":"tail","description":{"text":"Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.","provenance":"source","from":"CVE.org"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.01694,"percentile":0.771,"provenance":"source"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70321","tags":["vendor-advisory","patch"]}],"priority":{"score":21.6,"factors":[{"name":"EPSS percentile","points":15.42},{"name":"CVSS severity","points":6.16}]},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Microsoft SharePoint Server Subscription Edition","versions":[">= 16.0.0, < 16.0.19725.20522"]}],"euvd":{"id":"EUVD-2026-56573","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-sharepoint-cwe-502"}}