Microsoft: >> Windows 10 20h2 Security Vulnerabilities
CVE-2021-36955
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Known exploited
CVSS Score
7.8
EPSS Score
0.19
Published
2021-09-15
CVE-2021-36948
Windows Update Medic Service Elevation of Privilege Vulnerability
Known exploited
CVSS Score
7.8
EPSS Score
0.001
Published
2021-08-12
CVE-2021-34484
Windows User Profile Service Elevation of Privilege Vulnerability
Known exploited
CVSS Score
7.8
EPSS Score
0.062
Published
2021-08-12
CVE-2021-34486
Windows Event Tracing Elevation of Privilege Vulnerability
Known exploited
CVSS Score
7.8
EPSS Score
0.289
Published
2021-08-12
CVE-2021-36934
<p>An elevation of privilege vulnerability exists because of overly permissive Access Control Lists (ACLs) on multiple system files, including the Security Accounts Manager (SAM) database. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p>
<p>An attacker must have the ability to execute code on a victim system to exploit this vulnerability.</p>
<p>After installing this security update, you <em>must</em> manually delete all shadow copies of system files, including the SAM database, to fully mitigate this vulnerabilty. <strong>Simply installing this security update will not fully mitigate this vulnerability.</strong> See <a href="https://support.microsoft.com/topic/1ceaa637-aaa3-4b58-a48b-baf72a2fa9e7">KB5005357- Delete Volume Shadow Copies</a>.</p>
Known exploited
CVSS Score
7.8
EPSS Score
0.898
Published
2021-07-22
CVE-2021-34448
Scripting Engine Memory Corruption Vulnerability
Known exploited
CVSS Score
6.8
EPSS Score
0.021
Published
2021-07-16
CVE-2021-33771
Windows Kernel Elevation of Privilege Vulnerability
Known exploited
CVSS Score
7.8
EPSS Score
0.017
Published
2021-07-14
CVE-2021-31979
Windows Kernel Elevation of Privilege Vulnerability
Known exploited
CVSS Score
7.8
EPSS Score
0.01
Published
2021-07-14
CVE-2021-34527
<p>A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p>
<p>UPDATE July 7, 2021: The security update for Windows Server 2012, Windows Server 2016 and Windows 10, Version 1607 have been released. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability.</p>
<p>In addition to installing the updates, in order to secure your system, you must confirm that the following registry settings are set to 0 (zero) or are not defined (<strong>Note</strong>: These registry keys do not exist by default, and therefore are already at the secure setting.), also that your Group Policy setting are correct (see FAQ):</p>
<ul>
<li>HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers\PointAndPrint</li>
<li>NoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting)</li>
<li>UpdatePromptSettings = 0 (DWORD) or not defined (default setting)</li>
</ul>
<p><strong>Having NoWarningNoElevationOnInstall set to 1 makes your system vulnerable by design.</strong></p>
<p>UPDATE July 6, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. See also <a href="https://support.microsoft.com/topic/31b91c02-05bc-4ada-a7ea-183b129578a7">KB5005010: Restricting installation of new printer drivers after applying the July 6, 2021 updates</a>.</p>
<p>Note that the security updates released on and after July 6, 2021 contain protections for CVE-2021-1675 and the additional remote code execution exploit in the Windows Print Spooler service known as “PrintNightmare”, documented in CVE-2021-34527.</p>
Known exploited
CVSS Score
8.8
EPSS Score
0.943
Published
2021-07-02
CVE-2021-33739
Microsoft DWM Core Library Elevation of Privilege Vulnerability
Known exploited
CVSS Score
8.4
EPSS Score
0.14
Published
2021-06-08