CVE-2026-64921High· 8.8▾ TwilightMissing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.2 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
1.0%
Last analysed / modified upstream
Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
sharepoint_enterprise_server_2016 >= 16.0.0 < 16.0.5565.1001sharepoint_server_2019 >= 16.0.0 < 16.0.10417.20198sharepoint_server_subscription_edition >= 16.0.0 < 16.0.19725.20522Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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