Detections
Analytics

Security Updates for Microsoft SharePoint Server Subscription Edition (October 2026)

high Nessus Plugin ID 365628

Synopsis

The Microsoft SharePoint Server Subscription Edition installation on the remote host is affected by multiple vulnerabilities.

Description

The Microsoft SharePoint Server Subscription Edition installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

 - Remote Code Execution via integer overflow in Microsoft Office SharePoint (CVE-2026-88166)

 - Elevation of Privilege in SharePoint Server Subscription Edition (CVE-2026-96044)

 - Elevation of privilege via improper cryptographic signature verification (CVE-2026-102866)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Microsoft has released the following security updates to address this issue:
 - Update to version 16.0.20326.20190

See Also

https://support.microsoft.com/help/5002927

Plugin Details

Severity: High

ID: 365628

File Name: smb_nt_ms26_oct_office_sharepoint_subscr.nasl

Version: 1.2

Type: Local

Agent: windows

Published: 10/14/2026

Updated: 10/15/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.5

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-97755

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:sharepoint_server:subscription

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 10/13/2026

Vulnerability Publication Date: 10/13/2026

Reference Information

CVE: CVE-2026-102859, CVE-2026-102860, CVE-2026-102861, CVE-2026-102862, CVE-2026-102863, CVE-2026-102864, CVE-2026-102865, CVE-2026-102866, CVE-2026-105013, CVE-2026-105713, CVE-2026-105719, CVE-2026-105720, CVE-2026-69943, CVE-2026-70202, CVE-2026-70217, CVE-2026-70246, CVE-2026-70251, CVE-2026-70259, CVE-2026-70266, CVE-2026-70267, CVE-2026-70298, CVE-2026-85900, CVE-2026-85932, CVE-2026-88155, CVE-2026-88166, CVE-2026-88198, CVE-2026-88200, CVE-2026-88204, CVE-2026-88206, CVE-2026-88208, CVE-2026-88209, CVE-2026-96044, CVE-2026-97755, CVE-2026-97782

CWE: 121, 122, 125, 190, 20, 203, 22, 270, 284, 347, 502, 79, 829, 862, 863, 89, 918, 94

MSFT: MS26-5002927

MSKB: 5002927