Microsoft addresses 44 CVEs in its August Patch Tuesday release, including two vulnerabilities publicly disclosed, and one zero-day exploited in the wild.

Microsoft’s August 2021 Patch Tuesday Addresses 44 CVEs (CVE-2021-26424, CVE-2021-36948)

Windows TCP/IP Remote Code Execution Vulnerability

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.
    (CVE-2021-34480)

The remote Windows host is missing security update 5005030.
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-2021-26424,     CVE-2021-26432, CVE-2021-34530, CVE-2021-34533,     CVE-2021-34534, CVE-2021-34535, CVE-2021-36936,     CVE-2021-36937, CVE-2021-36947)

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

  - An elevation of privilege vulnerability. An attacker can     exploit this to gain elevated privileges.
    (CVE-2021-26425, CVE-2021-26426, CVE-2021-34483,     CVE-2021-34484, CVE-2021-34486, CVE-2021-34487,     CVE-2021-34536, CVE-2021-34537, CVE-2021-36948)

  - An memory corruption vulnerability exists. An attacker     can exploit this to corrupt the memory and cause     unexpected behaviors within the system/application.
    (CVE-2021-34480)

  - An information disclosure vulnerability. An attacker can     exploit this to disclose potentially sensitive     information. (CVE-2021-26433, CVE-2021-36926,     CVE-2021-36932, CVE-2021-36933, CVE-2021-36938)

The remote Windows host is missing security update 5005043.
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-2021-26424,     CVE-2021-26432, CVE-2021-34530, CVE-2021-34533,     CVE-2021-34534, CVE-2021-34535, CVE-2021-36936,     CVE-2021-36937, CVE-2021-36947)

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

  - An elevation of privilege vulnerability. An attacker can     exploit this to gain elevated privileges.
    (CVE-2021-26425, CVE-2021-26426, CVE-2021-34483,     CVE-2021-34484, CVE-2021-34487, CVE-2021-34536,     CVE-2021-34537)

  - An memory corruption vulnerability exists. An attacker     can exploit this to corrupt the memory and cause     unexpected behaviors within the system/application.
    (CVE-2021-34480)

  - An information disclosure vulnerability. An attacker can     exploit this to disclose potentially sensitive     information. (CVE-2021-26433, CVE-2021-36926,     CVE-2021-36932, CVE-2021-36933, CVE-2021-36938)

The remote Windows host is missing security update 5005106 or cumulative update 5005076. 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-2021-26426, 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-2021-26432, CVE-2021-34533, CVE-2021-34535,     CVE-2021-36936, CVE-2021-36937, CVE-2021-36947)

  - An information disclosure vulnerability. An attacker can     exploit this to disclose potentially sensitive     information. (CVE-2021-26433, CVE-2021-36926,     CVE-2021-36932, CVE-2021-36933)

  - An memory corruption vulnerability exists. An attacker     can exploit this to corrupt the memory and cause     unexpected behaviors within the system/application.
    (CVE-2021-34480)

The remote Windows host is missing security update 5005033.
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-2021-26426, CVE-2021-26431,     CVE-2021-34483, CVE-2021-34484, CVE-2021-34486,     CVE-2021-34487, CVE-2021-34536, CVE-2021-34537,     CVE-2021-36948)

  - A remote code execution vulnerability. An attacker can     exploit this to bypass authentication and execute     unauthorized arbitrary commands. (CVE-2021-26424,     CVE-2021-26432, CVE-2021-34530, CVE-2021-34533,     CVE-2021-34534, CVE-2021-34535, CVE-2021-36936,     CVE-2021-36937, CVE-2021-36947)

  - An information disclosure vulnerability. An attacker can     exploit this to disclose potentially sensitive     information. (CVE-2021-26433, CVE-2021-36926,     CVE-2021-36932, CVE-2021-36933)

  - An memory corruption vulnerability exists. An attacker     can exploit this to corrupt the memory and cause     unexpected behaviors within the system/application.
    (CVE-2021-34480)

The remote Windows host is missing security update 5005031.
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-2021-26424,     CVE-2021-26432, CVE-2021-34530, CVE-2021-34533,     CVE-2021-34534, CVE-2021-34535, CVE-2021-36936,     CVE-2021-36937, CVE-2021-36947)

  - An elevation of privilege vulnerability. An attacker can     exploit this to gain elevated privileges.
    (CVE-2021-26425, CVE-2021-26426, CVE-2021-34483,     CVE-2021-34484, CVE-2021-34486, CVE-2021-34487,     CVE-2021-34536, CVE-2021-34537, CVE-2021-36948)

  - An information disclosure vulnerability. An attacker can     exploit this to disclose potentially sensitive     information. (CVE-2021-26433, CVE-2021-36926,     CVE-2021-36932, CVE-2021-36933)

  - An memory corruption vulnerability exists. An attacker     can exploit this to corrupt the memory and cause     unexpected behaviors within the system/application.
    (CVE-2021-34480)

The remote Windows host is missing security update 5005095 or cumulative update 5005090. 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-2021-26424,     CVE-2021-34533, CVE-2021-36936, CVE-2021-36937,     CVE-2021-36947)

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

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

The remote Windows host is missing security update 5005040.
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-2021-26424,     CVE-2021-26432, CVE-2021-34530, CVE-2021-34533,     CVE-2021-34534, CVE-2021-34535, CVE-2021-36936,     CVE-2021-36937, CVE-2021-36947)

  - An information disclosure vulnerability. An attacker can     exploit this to disclose potentially sensitive     information. (CVE-2021-26433, CVE-2021-36926,     CVE-2021-36932, CVE-2021-36933, CVE-2021-36938)

  - An elevation of privilege vulnerability. An attacker can     exploit this to gain elevated privileges.
    (CVE-2021-26425, CVE-2021-26426, CVE-2021-34483,     CVE-2021-34484, CVE-2021-34536, CVE-2021-34537)

  - An memory corruption vulnerability exists. An attacker     can exploit this to corrupt the memory and cause     unexpected behaviors within the system/application.
    (CVE-2021-34480)

The remote Windows host is missing security update 5005094 or cumulative update 5005099. 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-2021-26426, CVE-2021-34483,     CVE-2021-34484, 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-2021-26432, CVE-2021-34533, CVE-2021-34535,     CVE-2021-36936, CVE-2021-36937, CVE-2021-36947)

  - An information disclosure vulnerability. An attacker can     exploit this to disclose potentially sensitive     information. (CVE-2021-26433, CVE-2021-36926,     CVE-2021-36932, CVE-2021-36933)

  - An memory corruption vulnerability exists. An attacker     can exploit this to corrupt the memory and cause     unexpected behaviors within the system/application.
    (CVE-2021-34480)

ID	Name	Product	Family	Severity
152436	KB5005089: Windows 7 and Windows Server 2008 R2 Security Update (August 2021)	Nessus	Windows : Microsoft Bulletins	critical
152435	KB5005030: Windows 10 Version 1809 and Windows Server 2019 Security Update (August 2021)	Nessus	Windows : Microsoft Bulletins	critical
152434	KB5005043: Windows 10 Version 1607 and Windows Server 2016 Security Update (August 2021)	Nessus	Windows : Microsoft Bulletins	critical
152433	KB5005106: Windows 8.1 and Windows Server 2012 R2 Security Update (August 2021)	Nessus	Windows : Microsoft Bulletins	critical
152431	KB5005033: Windows 10 Version 2004 / Windows 10 Version 20H2 / Windows 10 Version 21H1 Security Update (August 2021)	Nessus	Windows : Microsoft Bulletins	critical
152430	KB5005031: Windows 10 Version 1909 Security Update (August 2021)	Nessus	Windows : Microsoft Bulletins	critical
152425	KB5005095: Windows Server 2008 Security Update (August 2021)	Nessus	Windows : Microsoft Bulletins	critical
152422	KB5005040: Windows 10 version 1507 LTS Security Update (August 2021)	Nessus	Windows : Microsoft Bulletins	critical
152421	KB5005094: Windows Server 2012 Security Update (August 2021)	Nessus	Windows : Microsoft Bulletins	critical

Detections

Analytics

CVE-2021-26424

critical

Tenable Plugins

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