Security Updates for Microsoft Office Web Apps (October 2021)

high Nessus Plugin ID 154171


The Microsoft Office Web Apps installation on the remote host is affected by multiple vulnerabilities.


The Microsoft Office Web Apps 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-2021-40474, CVE-2021-40486)

- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-40472)


Microsoft has released KB5002036 to address this issue.

See Also

Plugin Details

Severity: High

ID: 154171

File Name: smb_nt_ms21_oct_office_web.nasl

Version: 1.7

Type: local

Agent: windows

Published: 10/15/2021

Updated: 11/28/2023

Supported Sensors: Nessus

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.6

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

CVSS Score Source: CVE-2021-40486


Risk Factor: High

Base Score: 7.8

Temporal Score: 7.2

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:office_web_apps, cpe:/a:microsoft:office_online_server

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/12/2021

Vulnerability Publication Date: 10/12/2021

Reference Information

CVE: CVE-2021-40472, CVE-2021-40474, CVE-2021-40486

IAVA: 2021-A-0465-S, 2021-A-0468-S, 2021-A-0473-S

MSFT: MS21-5002036

MSKB: 5002036