No exploitation reportedFix available

CVE-2020-1126

No exploitation reported by the sources we read.

Published2020-05-21
WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2020-05-2123:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-1126?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-1126?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft windows 10

Branch	Affected	Fixed in	Source
1607.x	= 1607	no fix published	NVD
1709.x	= 1709	no fix published	NVD
1803.x	= 1803	no fix published	NVD
1809.x	= 1809	no fix published	NVD
1903.x	= 1903	no fix published	NVD
1909.x	= 1909	no fix published	NVD

Microsoft windows server 2016

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Microsoft windows server 2019

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

portal.msrc.microsoft.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.09.3read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score4.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2020-05-21
Last Modified: 2026-08-19
NVD status: Modified

Frequently asked questions

What is CVE-2020-1126?

Is CVE-2020-1126 actively exploited?

Active exploitation of CVE-2020-1126 has not been confirmed. Its EPSS score was 4.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-1126?

CVE-2020-1126 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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