---
id: CVE-2020-1126
title: >-
  A memory corruption vulnerability exists when Windows Media Foundation
  improperly handles objects in memory
summary: >-
  A memory corruption vulnerability exists when Windows Media Foundation
  improperly handles objects in memory. An attacker who successfully exploited
  the vulnerability could install programs; view, change, or delete data; or
  create new acc…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: microsoft
product: windows_10
affected:
  - windows_10 = 1607
  - windows_10 = 1709
  - windows_10 = 1803
  - windows_10 = 1809
  - windows_10 = 1903
  - windows_10 = 1909
  - windows_server_2016
  - windows_server_2019
published: '2020-05-21'
updated: '2026-08-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-1126'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1126'
    label: secure@microsoft.com
  - url: >-
      https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1126
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.04009
epssPercentile: 0.90114
ingestedAt: '2026-08-19T17:42:38.762Z'
---

## Overview

A memory corruption vulnerability exists when Windows Media Foundation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could install programs; view, change, or delete data; or create new accounts with full user rights.
There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit a malicious webpage.
The security update addresses the vulnerability by correcting how Windows Media Foundation handles objects in memory.

## Affected

- `windows_10 = 1607`
- `windows_10 = 1709`
- `windows_10 = 1803`
- `windows_10 = 1809`
- `windows_10 = 1903`
- `windows_10 = 1909`
- `windows_server_2016`
- `windows_server_2019`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.