Security Updates for Microsoft SharePoint Server 2013 (June 2021)

high Nessus Plugin ID 150360


The Microsoft SharePoint Server 2013 installation on the remote host is affected by multiple vulnerabilities.


The Microsoft SharePoint Server 2013 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

- Microsoft SharePoint Server Remote Code Execution Vulnerability (CVE-2021-26420, CVE-2021-31963, CVE-2021-31964, CVE-2021-31966)

- Microsoft SharePoint Server Spoofing Vulnerability (CVE-2021-31948, CVE-2021-31950)

- Microsoft SharePoint Server Information Disclosure Vulnerability (CVE-2021-31965) Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Microsoft has released the following security updates to address this issue:

See Also

Plugin Details

Severity: High

ID: 150360

File Name: smb_nt_ms21_june_office_sharepoint_2013.nasl

Version: 1.8

Type: local

Agent: windows

Published: 6/8/2021

Updated: 5/9/2022

Risk Information


Risk Factor: High

Score: 7.4


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.1

Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P

Temporal Vector: E:POC/RL:OF/RC:C

CVSS Score Source: CVE-2021-31966


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

Temporal Vector: E:P/RL:O/RC:C

CVSS Score Source: CVE-2021-31963

Vulnerability Information

CPE: cpe:/a:microsoft:sharepoint_server

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/8/2021

Vulnerability Publication Date: 6/8/2021

Reference Information

CVE: CVE-2021-26420, CVE-2021-31948, CVE-2021-31950, CVE-2021-31963, CVE-2021-31964, CVE-2021-31965, CVE-2021-31966

MSKB: 5001954, 5001962

MSFT: MS21-5001954, MS21-5001962

IAVA: 2021-A-0277-S