Name: CVE-2026-102866: Microsoft Microsoft SharePoint Server Subscription Edition: Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to…
Creator: Rapid7
Published: 2026-10-13T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-102866, CWE-347, CVSS 8.1

Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

CVSS Details

CVSS 3.1 Base Score: 8.1
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Microsoft Sharepoint	—	Upgrade to the latest version of Microsoft SharePoint Subscription Edition	Oct 13, 2026	Oct 13, 2026

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CVSS Details

Covered by Rapid7

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