Security Updates for Exchange (January 2022)

critical Nessus Plugin ID 156745
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 Exchange Server installed on the remote host is affected by multiple vulnerabilities.


The Microsoft Exchange Server installed on the remote host is missing security updates. It is, therefore, affected by a remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary code.


Microsoft has released KB5008631 to address this issue.

See Also

Plugin Details

Severity: Critical

ID: 156745

File Name: smb_nt_ms22_jan_exchange.nasl

Version: 1.2

Type: local

Agent: windows

Published: 1/14/2022

Updated: 1/17/2022

Dependencies: ms_bulletin_checks_possible.nasl, microsoft_exchange_installed.nbin

Risk Information

CVSS Score Source: CVE-2022-21846


Risk Factor: Critical

Score: 9.2


Risk Factor: High

Base Score: 8.3

Temporal Score: 6.1

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

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


Risk Factor: Critical

Base Score: 9

Temporal Score: 7.8

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:exchange_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-2022-21846, CVE-2022-21855, CVE-2022-21969

MSKB: 5008631

MSFT: MS22-5008631

IAVA: 2022-A-0009