CVE-2020-16877

Windows Elevation of Privilege Vulnerability

CVE-2020-16877 is fixed in 12 products on 1 platform, first by KB4577671, released October 13, 2020. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.1
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0096
61st percentile

<p>An elevation of privilege vulnerability exists when Microsoft Windows improperly handles reparse points. An attacker who successfully exploited this vulnerability could overwrite or delete a targeted file that would normally require elevated permissions.</p> <p>To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and overwrite or delete files.</p> <p>The security update addresses the vulnerability by correcting how Windows handles reparse points.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1903 for 32-bit Systems KB4577671 Oct 13, 2020
Windows 10 Version 1903 for ARM64-based Systems KB4577671 Oct 13, 2020
Windows 10 Version 1903 for x64-based Systems KB4577671 Oct 13, 2020
Windows 10 Version 1909 for 32-bit Systems KB4577671 Oct 13, 2020
Windows 10 Version 1909 for ARM64-based Systems KB4577671 Oct 13, 2020
Windows 10 Version 1909 for x64-based Systems KB4577671 Oct 13, 2020
Windows 10 Version 2004 for 32-bit Systems 19041.572 KB4579311 Oct 13, 2020
Windows 10 Version 2004 for ARM64-based Systems 19041.572 KB4579311 Oct 13, 2020
Windows 10 Version 2004 for x64-based Systems 19041.572 KB4579311 Oct 13, 2020
Windows Server, version 1903 (Server Core installation) KB4577671 Oct 13, 2020
Windows Server, version 1909 (Server Core installation) KB4577671 Oct 13, 2020
Windows Server, version 2004 (Server Core installation) 19041.572 KB4579311 Oct 13, 2020

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