Microsoft Windows 10 20H2 vulnerabilities
283 vulnerabilities
Known vulnerabilities in Microsoft Windows 10 20H2, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
CVE-2013-3900microsoftwindows_10_1507+43KEV
EPSS score44.65%
Why is Microsoft republishing a CVE from 2013?
We are republishing CVE-2013-3900 in the Security Update Guide to update the Security Updates table and to inform customers that the EnableCertPaddingCheck is available in all currently supported versions of Windows 10 and Windows 11. While the format is different from the original CVE published in 2013, except for clarifications about how to configure the EnableCertPaddingCheck registry value, the information herein remains unchanged from the original text published on December 10, 2013,
Microsoft does not plan to enforce the stricter verification behavior as a default functionality on supported releases of Microsoft Windows. This behavior remains available as an opt-in feature via reg key setting, and is available on supported editions of Windows released since December 10, 2013. This includes all currently supported versions of Windows 10 and Windows 11. The supporting code for this reg key was incorporated at the time of release for Windows 10 and Windows 11, so no security update is required; however, the reg key must be set. See the Security Updates table for the list of affected software.
Vulnerability Description
A remote code execution vulnerability exists in the way that the WinVerifyTrust function handles Windows Authenticode signature verification for portable executable (PE) files. An anonymous attacker could exploit the vulnerability by modifying an existing signed executable file to leverage unverified portions of the file in such a way as to add malicious code to the file without invalidating the signature. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Exploitation of this vulnerability requires that a user or application run or install a specially crafted, signed PE file. An attacker could modify an... See more at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2013-3900CVE-2021-40444microsoftwindows_10_1507+35KEVRansomwareEPSS score97.84%
Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents.
An attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. The attacker would then have to convince the user to open the malicious document. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Microsoft Defender Antivirus and Microsoft Defender for Endpoint both provide detection and protections for the known vulnerability. Customers should keep antimalware products up to date. Customers who utilize automatic updates do not need to take additional action. Enterprise customers who manage updates should select the detection build 1.349.22.0 or newer and deploy it across their environments. Microsoft Defender for Endpoint alerts will be displayed as: “Suspicious Cpl File Execution”.
Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs.
Please see the Mitigations and Workaround sections for important information about steps you can take to protect your system from this vulnerability.
UPDATE September 14, 2021: Microsoft 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. Please see the FAQ for important information about which updates are applicable to your system.CVE-2021-40449microsoftwindows_10_1507+38KEVRansomwareEPSS score81.94%
Win32k Elevation of Privilege VulnerabilityCVE-2021-40450microsoftwindows_10_1809+18KEVEPSS score1.58%
Win32k Elevation of Privilege VulnerabilityCVE-2021-1732microsoftwindows_10_1803+17KEVRansomwareEPSS score78.38%
Windows Win32k Elevation of Privilege VulnerabilityCVE-2021-1675microsoftwindows_10_1507+34KEVRansomwareEPSS score85.30%
Windows Print Spooler Remote Code Execution VulnerabilityCVE-2021-41379microsoftwindows_10_1507+37KEVRansomwareEPSS score19.45%
Windows Installer Elevation of Privilege VulnerabilityCVE-2021-41357microsoftwindows_10_2004+12KEVEPSS score1.58%
Win32k Elevation of Privilege VulnerabilityCVE-2021-31166microsoftwindows_10_2004+7KEVEPSS score99.87%
HTTP Protocol Stack Remote Code Execution VulnerabilityCVE-2021-31956microsoftwindows_10_1507+35KEVEPSS score22.27%
Windows NTFS Elevation of Privilege VulnerabilityCVE-2021-31199microsoftwindows_10_1507+35KEVEPSS score2.95%
Microsoft Enhanced Cryptographic Provider Elevation of Privilege VulnerabilityCVE-2021-31955microsoftwindows_10_1809+15KEVEPSS score81.11%
Windows Kernel Information Disclosure VulnerabilityCVE-2021-31979microsoftwindows_10_1507+34KEVEPSS score4.54%
Windows Kernel Elevation of Privilege VulnerabilityCVE-2021-31201microsoftwindows_10_1507+35KEVEPSS score2.62%
Microsoft Enhanced Cryptographic Provider Elevation of Privilege VulnerabilityCVE-2021-36934microsoftwindows_10_1809+9KEVEPSS score67.25%
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.
An attacker must have the ability to execute code on a victim system to exploit this vulnerability.
After installing this security update, you must manually delete all shadow copies of system files, including the SAM database, to fully mitigate this vulnerabilty. Simply installing this security update will not fully mitigate this vulnerability. See KB5005357- Delete Volume Shadow Copies.CVE-2021-36948microsoftwindows_10_1809+15KEVEPSS score23.27%
Windows Update Medic Service Elevation of Privilege VulnerabilityCVE-2021-36955microsoftwindows_10_1507+35KEVRansomwareEPSS score4.07%
Windows Common Log File System Driver Elevation of Privilege VulnerabilityCVE-2021-43226microsoftwindows_10_1507+40KEVRansomwareEPSS score3.28%
Windows Common Log File System Driver Elevation of Privilege VulnerabilityCVE-2021-28310microsoftwindows_10_1803+17KEVEPSS score8.40%
Win32k Elevation of Privilege VulnerabilityCVE-2021-34448microsoftwindows_10_1507+23KEVEPSS score40.06%
Scripting Engine Memory Corruption Vulnerability