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CVE-2020-0909

Windows Hyper-V Denial of Service Vulnerability

A denial of service vulnerability exists when Hyper-V on a Windows Server fails to properly handle specially crafted network packets. To exploit the vulnerability, an attacker would send specially crafted network packets to the Hyper-V Server. The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to properly handle these network packets.

CVSS 3.1 · 7.5 High EPSS 4.7% KEV · Not listed
Vendors
Microsoft
Products
Windows 10 Windows 10 1507 Windows 10 1607 and 15 more
CVE-2020-1157

Windows Runtime Elevation of Privilege Vulnerability

An elevation of privilege vulnerability exists when the Windows Runtime improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in an elevated context. An attacker could exploit this vulnerability by running a specially crafted application on the victim system. The update addresses the vulnerability by correcting the way the Windows Runtime handles objects in memory.

CVSS 3.1 · 7.8 High EPSS 2.6% KEV · Not listed
Vendors
Microsoft
Products
Windows 10 Windows 10 1507 Windows 10 1607 and 8 more
CVE-2021-26887

Microsoft Windows Folder Redirection Elevation of Privilege Vulnerability

An elevation of privilege vulnerability exists in Microsoft Windows when Folder redirection has been enabled via Group Policy. When folder redirection file server is co-located with Terminal server, an attacker who successfully exploited the vulnerability would be able to begin redirecting another user's personal data to a created folder. To exploit the vulnerability, an attacker can create a new folder under the Folder Redirection root path and create a junction on a newly created User folder. When the new user logs in, Folder Redirection would start redirecting to the folder and copying personal data. This elevation of privilege vulnerability can only be addressed by reconfiguring Folder Redirection with Offline files and restricting permissions, and NOT via a security update for affected Windows Servers. See the FAQ section of this CVE for configuration guidance.

CVSS 3.1 · 7.8 High EPSS 1.1% KEV · Not listed
Vendors
Microsoft
Products
Windows 10 Windows 10 1507 Windows 10 1607 and 16 more