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Full vulnerability report · 2020
CVE-2020-1150High confidence

Media Foundation Memory Corruption Vulnerability

Microsoft · Windows 7

7.8HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 3.25% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Microsoft Windows 7 and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2020-12034

No EUVD known-exploited evidence

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.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
7.8 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

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.

What

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.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

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.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Out-of-bounds Write → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-787 ↗

CWE-787: Out-of-bounds Write. The product writes data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedCWE-787
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2020-12034Official EUVD mapping

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.

Official EUVD record ↗
Cyber Security Agency of Singapore · English · CSA-SB-20200527Security Bulletin 27 May 2020

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 27 May 2020, published on 27 May 2020. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2020-AVI-287Multiples vulnérabilités dans Microsoft Windows

.cve.org/CVERecord?id=CVE-2020-1138 Référence CVE CVE-2020-1139 https://www.cve.org/CVERecord?id=CVE-2020-1139 Référence CVE CVE-2020-1140 https://www.cve.org/CVERecord?id=CVE-2020-1140 Référence CVE CVE-2020-1141 https://www.cve.org/CVERecord?id=CVE-2020-1141 Référence CVE CVE-2020-1142 https://www.cve.org/CVERecord?id=CVE-2020-1142 Référence CVE CVE-2020-1143 https://www.cve.org/CVERecord?id=CVE-2020-1143 Référence CVE CVE-2020-1144 https://www.cve.org/CVERecord?id=CVE-2020-1144 Référence CVE CVE-2020-1145 https://www.cve.org/CVERecord?id=CVE-2020-1145 Référence CVE CVE-2020-1149 https://www.cve.org/CVERecord?id=CVE-2020-1149 Référence CVE CVE-2020-1150 https://www.cve.org/CVERecord?id=CVE-2020-1150 Référence CVE CVE-2020-1151 https://www.cve.org/CVERecord?id=CVE-2020-1151 Référence CVE CVE-2020-1153 https://www.cve.org/CVERecord?id=CVE-2020-1153 Référence CVE CVE-2020-1154 https://www.cve.org/CVERecord?id=CVE-2020-1154 Référence CVE CVE-2020-1155 https://www.cve.org/CVERecord?id=CVE-2020-1155 Référence CVE CVE-2020-1156 https://www.cve.org/CVERecord?id=CVE-2020-1156 Référence CVE CVE-2020-1157 https://www.cve.org/CVERecord?id=CVE-2020-1157 Référence CVE CVE-2020-1158 https://www.cve.org/CVERecord?id=CVE-2020-1158 Référence CVE CVE-2020-1164 https://www.cve.org/CVERecord?id=CVE-2020-1164 Ré

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-005770複数の Microsoft Windows 製品におけるメモリ破損の脆弱性

複数の Microsoft Windows 製品には、Windows メディアファンデーションがメモリ内のオブジェクトを適切に処理しない場合、メモリ破損の脆弱性が存在します。 ベンダは、本脆弱性を「メディア ファンデーションのメモリ破損の脆弱性」として公開しています。 本脆弱性は、CVE-2020-1028、CVE-2020-1136、CVE-2020-1150 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-005714複数の Microsoft Windows 製品におけるメモリ破損の脆弱性

複数の Microsoft Windows 製品には、Windows メディアファンデーションがメモリ内のオブジェクトを適切に処理しない場合、メモリ破損の脆弱性が存在します。 ベンダは、本脆弱性を「メディア ファンデーションのメモリ破損の脆弱性」として公開しています。 本脆弱性は、CVE-2020-1126、CVE-2020-1136、CVE-2020-1150 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-005698複数の Microsoft Windows 製品におけるメモリ破損の脆弱性

複数の Microsoft Windows 製品には、Windows メディアファンデーションがメモリ内のオブジェクトを適切に処理しない場合、メモリ破損の脆弱性が存在します。 ベンダは、本脆弱性を「メディア ファンデーションのメモリ破損の脆弱性」として公開しています。 本脆弱性は、CVE-2020-1028、CVE-2020-1126、CVE-2020-1150 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-005797Microsoft Windows 7 および Windows Server 2008 におけるメモリ破損の脆弱性

Microsoft Windows 7 および Windows Server 2008 には、Windows メディアファンデーションがメモリ内のオブジェクトを適切に処理しない場合、メモリ破損の脆弱性が存在します。 ベンダは、本脆弱性を「メディア ファンデーションのメモリ破損の脆弱性」として公開しています。 本脆弱性は、CVE-2020-1028、CVE-2020-1126、CVE-2020-1136 とは異なる脆弱性です。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 21 May 2020 · Last source change 19 Aug 2026, 16:33 UTC · CWE-787 · Out-of-bounds Write

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2020-12034
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: added remediation: portal.msrc.microsoft.com/CVE-2020-1150; removed patch: msrc.microsoft.com/CVE-2020-1150; removed remediation: msrc.microsoft.com/CVE-2020-1150.
    Before
    patch: msrc.microsoft.com/CVE-2020-1150 · patch: portal.msrc.microsoft.com/CVE-2020-1150 · remediation: msrc.microsoft.com/CVE-2020-1150
    After
    patch: portal.msrc.microsoft.com/CVE-2020-1150 · remediation: portal.msrc.microsoft.com/CVE-2020-1150
    portal.msrc.microsoft.com ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added patch: msrc.microsoft.com/CVE-2020-1150; added remediation: msrc.microsoft.com/CVE-2020-1150; removed remediation: portal.msrc.microsoft.com/CVE-2020-1150.
    Before
    patch: portal.msrc.microsoft.com/CVE-2020-1150 · remediation: portal.msrc.microsoft.com/CVE-2020-1150
    After
    patch: msrc.microsoft.com/CVE-2020-1150 · patch: portal.msrc.microsoft.com/CVE-2020-1150 · remediation: msrc.microsoft.com/CVE-2020-1150
    msrc.microsoft.com ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    7 for 32-bit Systems Service Pack 1; 7 for x64-based Systems Service Pack 1; 2008 R2 for Itanium-Based Systems Service Pack 1; 2008 R2 for x64-based Systems Service Pack 1; 2008 R2 for x64-based Systems Service Pack 1 (Core installation) · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    6.1.0 < publication; 6.1.7601.0 < publication · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    CNA ↗
  4. CVSS scoreCVSS vector changed while the displayed base score remained 7.8.
    Before
    7.8 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
    After
    7.8 (CVSS 3.1 · CNA · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2020-12034↗Patch or update reference↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2020-1150 · cve.blacktree.nl