Security Updates for Microsoft Office Products (December 2021)

high Nessus Plugin ID 156062


The Microsoft Office Products are affected by multiple vulnerabilities.


The Microsoft Office Products are 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-2021-43256, CVE-2021-43875)

- An elevation of privilege vulnerability. An attacker can exploit this to gain elevated privileges.

- A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges of another user. (CVE-2021-43255)

- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-42295)


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

For Office 365, Office 2016 C2R, or Office 2019, ensure automatic updates are enabled or open any office app and manually perform an update.

See Also

Plugin Details

Severity: High

ID: 156062

File Name: smb_nt_ms21_dec_office.nasl

Version: 1.6

Type: local

Agent: windows

Published: 12/14/2021

Updated: 6/10/2022

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

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

CVSS Score Source: CVE-2021-43875


Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:office

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 12/14/2021

Vulnerability Publication Date: 12/14/2021

Reference Information

CVE: CVE-2021-42293, CVE-2021-42295, CVE-2021-43255, CVE-2021-43256, CVE-2021-43875

MSKB: 4486726, 4504710, 4504745, 5002033, 5002099, 5002101, 5002104

MSFT: MS21-4504710, MS21-4504745, MS21-4486726, MS21-5002033, MS21-5002099, MS21-5002101, MS21-5002104

IAVA: 2021-A-0584