Security Updates for Microsoft Office Web Apps (January 2022)

high Nessus Plugin ID 156714
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The Microsoft Office Web Apps installation on the remote host is missing a security update.


The Microsoft Office Web Apps installation on the remote host is missing a security update. It is, therefore, affected by a remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary code. (CVE-2022-21840)


Microsoft has released KB5002122 to address this issue.

See Also

Plugin Details

Severity: High

ID: 156714

File Name: smb_nt_ms22_jan_office_web.nasl

Version: 1.4

Type: local

Agent: windows

Published: 1/13/2022

Updated: 1/17/2022

Dependencies: office_installed.nasl, ms_bulletin_checks_possible.nasl, smb_hotfixes.nasl, microsoft_owa_installed.nbin, microsoft_office_compatibility_pack_installed.nbin

Risk Information

CVSS Score Source: CVE-2022-21840


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C


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:2.3:a:microsoft:office_web_apps:*:*:*:*:*:*:*:*, cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:*

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 1/11/2022

Vulnerability Publication Date: 1/11/2022

Reference Information

CVE: CVE-2022-21840

MSKB: 5002122

MSFT: MS22-5002122

IAVA: 2022-A-0018