High severity8.8NVD Advisory· Published Aug 11, 2026· Updated Aug 11, 2026
CVE-2026-64921
CVE-2026-64921
Description
Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
Affected products
2Patches
Vulnerability mechanics
References
1News mentions
2- Microsoft's August 2026 Patch Tuesday Addresses 398 CVEs (CVE-2026-68820)Tenable Blog · Aug 11, 2026
- Microsoft Patch Tuesday Update August 2026 – 394 Vulnerabilities Fixed, Including 3 Zero-DaysCyber Security News · Aug 11, 2026