{"id":"CVE-2026-63516","published":"2026-08-11T17:03:30Z","modified":"2026-10-30T17:19:16Z","title":"Microsoft SharePoint Server Spoofing Vulnerability","vendor":"Microsoft","product":"Microsoft SharePoint Enterprise Server 2016","tier":"tail","description":{"text":"Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.","provenance":"source","from":"CVE.org"},"cvss":{"score":6.5,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.01874,"percentile":0.79368,"provenance":"source"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63516","tags":["vendor-advisory","patch"]}],"priority":{"score":20.4,"factors":[{"name":"EPSS percentile","points":15.87},{"name":"CVSS severity","points":4.55}]},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Microsoft SharePoint Enterprise Server 2016","versions":[">= 16.0.0, < 16.0.5565.1001"]},{"vendor":"Microsoft","product":"Microsoft SharePoint Server 2019","versions":[">= 16.0.0, < 16.0.10417.20198"]},{"vendor":"Microsoft","product":"Microsoft SharePoint Server Subscription Edition","versions":[">= 16.0.0, < 16.0.19725.20522"]}],"euvd":{"id":"EUVD-2026-56297","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-sharepoint-cwe-502"}}