What is CVE-2020-16877?

CVE-2020-16877 is a security advisory published by Microsoft with High severity. EchelonGraph links Microsoft's advisory rather than copying its page; it is at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-16877.

Which CVE IDs does CVE-2020-16877 cover?

CVE-2020-16877 covers the following CVE IDs: CVE-2020-16877. Each CVE has its own detail page on EchelonGraph Pulse with its EchelonGraph score.

What is the CVSS v3 score of CVE-2020-16877?

CVE-2020-16877 has a CVSS v3 base score of 7.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2020-16877?

CVE-2020-16877 affects 12 products, including: Windows 10 Version 1903 for 32-bit Systems; Windows 10 Version 1903 for ARM64-based Systems; Windows 10 Version 1903 for x64-based Systems; Windows 10 Version 1909 for 32-bit Systems; Windows 10 Version 1909 for ARM64-based Systems; and others — see the full list on the advisory page.

How do I remediate CVE-2020-16877?

Microsoft lists 2 KB articles for CVE-2020-16877: KB4577671, KB4579311. Each is listed on this page with its update type and, where Microsoft gives one, its fixed build; Microsoft's advisory is at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-16877.

CVE-2020-16877HighMicrosoft CVSS 7.1CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:P/RL:O/RC:C

Microsoft security update for CVE-2020-16877 — Windows

Vendor

Microsoft Security Response Center (MSRC)

Published

October 13, 2020

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2020-16877 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-16877. This page also shows what EchelonGraph holds for CVE-2020-16877, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products12

Windows 10 Version 1903 for 32-bit Systems
Windows 10 Version 1903 for ARM64-based Systems
Windows 10 Version 1903 for x64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for x64-based Systems
Windows 10 Version 2004 for 32-bit Systems
Windows 10 Version 2004 for ARM64-based Systems
Windows 10 Version 2004 for x64-based Systems
Windows Server, version 1903 (Server Core installation)
Windows Server, version 1909 (Server Core installation)
Windows Server, version 2004 (Server Core installation)

✅ Updates Microsoft lists: 2 KB articles

2 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB article	Update	Fixed build
KB4577671	Security Update	—
KB4579311	Security Update	—

🧭 EchelonGraph on CVE-2020-16877

EchelonGraph score: 7.1 HIGH
CISA KEV: Not listed
Fix status: A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

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. 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. The security update addresses the vulnerability by correcting how Windows handles reparse points.

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2020-16877, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 CVE IDs covered (1)

📋 Microsoft's advisory

🎯 Affected products12

✅ Updates Microsoft lists: 2 KB articles

🧭 EchelonGraph on CVE-2020-16877

🔗 References (5)