KB5005089: Windows 7 and Windows Server 2008 R2 Security Update (August 2021)

critical Nessus Plugin ID 152436


The remote Windows host is affected by multiple vulnerabilities.


The remote Windows host is missing security update 5005089 or cumulative update 5005088. It is, therefore, affected by multiple vulnerabilities :

- An elevation of privilege vulnerability. An attacker can exploit this to gain elevated privileges.
(CVE-2021-26425, CVE-2021-34483, CVE-2021-34484, CVE-2021-34537, CVE-2021-36927)

- A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges of another user. (CVE-2021-36942)

- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-26424, CVE-2021-34533, CVE-2021-34535, CVE-2021-36936, CVE-2021-36937, CVE-2021-36947)

- An memory corruption vulnerability exists. An attacker can exploit this to corrupt the memory and cause unexpected behaviors within the system/application.


Apply Security Only update KB5005089 or Cumulative Update KB5005088.

See Also




Plugin Details

Severity: Critical

ID: 152436

File Name: smb_nt_ms21_aug_5005089.nasl

Version: 1.9

Type: local

Agent: windows

Published: 8/10/2021

Updated: 8/30/2022

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent

Risk Information


Risk Factor: Critical

Score: 9.6


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS Score Source: CVE-2021-36936


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.4

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

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

Vulnerability Information

CPE: cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:*

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/10/2021

Vulnerability Publication Date: 8/10/2021

CISA Known Exploited Dates: 11/17/2021, 4/21/2022

Reference Information

CVE: CVE-2021-34481, CVE-2021-34480, CVE-2021-34537, CVE-2021-26424, CVE-2021-26425, CVE-2021-36936, CVE-2021-36937, CVE-2021-36942, CVE-2021-36947, CVE-2021-34533, CVE-2021-34483, CVE-2021-34484, CVE-2021-34535, CVE-2021-36927

MSKB: 5005036, 5005089, 5005088

MSFT: MS21-5005036, MS21-5005089, MS21-5005088

IAVA: 2021-A-0374-S, 2021-A-0373-S