Detections
Analytics
Security Updates for Microsoft SharePoint Server 2016 (January 2026)
medium Nessus Plugin ID 283468
Language:
Synopsis
The Microsoft SharePoint Server 2016 installation on the remote host is affected by multiple vulnerabilities.Description
The Microsoft SharePoint Server 2016 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2026-20947, CVE-2026-20948, CVE-2026-62551, CVE-2026-62563)
- A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges of another user. (CVE-2026-20958)
- A information disclosure vulnerability exists. An authorized attacker could use this to disclose information over a network (CVE-2026-20959)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Microsoft has released security updates to address this issue.See Also
https://support.microsoft.com/en-us/help/5002828
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20943
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20947
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20948
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20951
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20958
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20959
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20963
Plugin Details
Severity: Medium
ID: 283468
File Name: smb_nt_ms26_jan_office_sharepoint_2016.nasl
Version: 1.4
Type: local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 1/13/2026
Updated: 2/24/2026
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: High
Base Score: 9
Temporal Score: 6.7
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS Score Source: CVE-2026-20963
CVSS v3
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4.7
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2026-20959
Vulnerability Information
CPE: cpe:/a:microsoft:sharepoint_server:2016
Required KB Items: SMB/MS_Bulletin_Checks/Possible
Exploit Ease: No known exploits are available
Patch Publication Date: 1/13/2026
Vulnerability Publication Date: 1/13/2026
Reference Information
CVE: CVE-2026-20943, CVE-2026-20947, CVE-2026-20948, CVE-2026-20951, CVE-2026-20958, CVE-2026-20959, CVE-2026-20963