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Full vulnerability report · 2020
CVE-2020-0755High confidence

Microsoft Windows — security vulnerability

Microsoft · Windows

5.5MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Low, lowered one band.downgradedsince 4 Aug 2024

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 1.61% 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 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: No default targetRemediation target: Normal maintenance

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-2020-2244

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

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
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

An information disclosure vulnerability exists in the Cryptography Next Generation (CNG) service when it fails to properly handle objects in memory.To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application.The security update addresses the vulnerability by correcting how the service handles objects in memory., aka 'Windows Key Isolation Service Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2020-0675, CVE-2020-0676, CVE-2020-0677, CVE-2020-0748, CVE-2020-0756.

What

An information disclosure vulnerability exists in the Cryptography Next Generation (CNG) service when it fails to properly handle objects in memory.To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application.The security update addresses the vulnerability by correcting how the service handles objects in memory., aka 'Windows Key Isolation Service Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2020-0675, CVE-2020-0676, CVE-2020-0677, CVE-2020-0748, CVE-2020-0756.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may obtain information outside the intended access boundary.

What

An information disclosure vulnerability exists in the Cryptography Next Generation (CNG) service when it fails to properly handle objects in memory.To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application.The security update addresses the vulnerability by correcting how the service handles objects in memory., aka 'Windows Key Isolation Service Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2020-0675, CVE-2020-0676, CVE-2020-0677, CVE-2020-0748, CVE-2020-0756.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may obtain information outside the intended access boundary.

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 → vulnerable operation → obtain information outside the intended access boundary
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
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.
CWE not yet assigned
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:L/UI:N/S:U/C:H/I:N/A:N

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.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
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.
A

Official authority intelligence

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

CERT-FR · French · CERTFR-2020-AVI-081Multiples vulnérabilités dans Microsoft Windows

.cve.org/CVERecord?id=CVE-2020-0746 Référence CVE CVE-2020-0747 https://www.cve.org/CVERecord?id=CVE-2020-0747 Référence CVE CVE-2020-0748 https://www.cve.org/CVERecord?id=CVE-2020-0748 Référence CVE CVE-2020-0749 https://www.cve.org/CVERecord?id=CVE-2020-0749 Référence CVE CVE-2020-0750 https://www.cve.org/CVERecord?id=CVE-2020-0750 Référence CVE CVE-2020-0751 https://www.cve.org/CVERecord?id=CVE-2020-0751 Référence CVE CVE-2020-0752 https://www.cve.org/CVERecord?id=CVE-2020-0752 Référence CVE CVE-2020-0753 https://www.cve.org/CVERecord?id=CVE-2020-0753 Référence CVE CVE-2020-0754 https://www.cve.org/CVERecord?id=CVE-2020-0754 Référence CVE CVE-2020-0755 https://www.cve.org/CVERecord?id=CVE-2020-0755 Référence CVE CVE-2020-0756 https://www.cve.org/CVERecord?id=CVE-2020-0756 Référence CVE CVE-2020-0757 https://www.cve.org/CVERecord?id=CVE-2020-0757 Référence CVE CVE-2020-0792 https://www.cve.org/CVERecord?id=CVE-2020-0792 Gestion détaillée du document le 11 février 2020 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèm

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-001861複数の Microsoft Windows 製品における情報を公開される脆弱性

複数の Microsoft Windows 製品には、Cryptography Next Generation (CNG) サービスがメモリ内のオブジェクトの適切な処理に失敗した場合、情報を公開される脆弱性が存在します。 ベンダは、本脆弱性を「Windows キー分離サービスの情報漏えいの脆弱性」として公開しています。 本脆弱性は、CVE-2020-0675、CVE-2020-0676、CVE-2020-0677、CVE-2020-0748、CVE-2020-0755 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-001860複数の Microsoft Windows 製品における情報を公開される脆弱性

複数の Microsoft Windows 製品には、Cryptography Next Generation (CNG) サービスがメモリ内のオブジェクトの適切な処理に失敗した場合、情報を公開される脆弱性が存在します。 ベンダは、本脆弱性を「Windows キー分離サービスの情報漏えいの脆弱性」として公開しています。 本脆弱性は、CVE-2020-0675、CVE-2020-0676、CVE-2020-0677、CVE-2020-0748、CVE-2020-0756 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-001799複数の Microsoft Windows 製品における情報を公開される脆弱性

複数の Microsoft Windows 製品には、Cryptography Next Generation (CNG) サービスがメモリ内のオブジェクトを適切に処理しない場合、情報を公開される脆弱性が存在します。 ベンダは、本脆弱性を「Windows キー分離サービスの情報漏えいの脆弱性」として公開しています。 本脆弱性は、CVE-2020-0675、CVE-2020-0676、CVE-2020-0748、CVE-2020-0755、CVE-2020-0756 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-001798複数の Microsoft Windows 製品における情報を公開される脆弱性

複数の Microsoft Windows 製品には、Cryptography Next Generation (CNG) サービスがメモリ内のオブジェクトを適切に処理しない場合、情報を公開される脆弱性が存在します。 ベンダは、本脆弱性を「Windows キー分離サービスの情報漏えいの脆弱性」として公開しています。 本脆弱性は、CVE-2020-0675、CVE-2020-0677、CVE-2020-0748、CVE-2020-0755、CVE-2020-0756 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-001797複数の Microsoft Windows 製品における情報を公開される脆弱性

複数の Microsoft Windows 製品には、Cryptography Next Generation (CNG) サービスがメモリ内のオブジェクトの適切な処理に失敗した場合、情報を公開される脆弱性が存在します。 ベンダは、本脆弱性を「Windows キー分離サービスの情報漏えいの脆弱性」として公開しています。 本脆弱性は、CVE-2020-0676、CVE-2020-0677、CVE-2020-0748、CVE-2020-0755、CVE-2020-0756 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-001777複数の Microsoft Windows 製品における情報を公開される脆弱性

複数の Microsoft Windows 製品には、Cryptography Next Generation (CNG) サービスがメモリ内のオブジェクトの適切な処理に失敗した場合、情報を公開される脆弱性が存在します。 ベンダは、本脆弱性を「Windows キー分離サービスの情報漏えいの脆弱性」として公開しています。 本脆弱性は、CVE-2020-0675、CVE-2020-0676、CVE-2020-0677、CVE-2020-0755、CVE-2020-0756 とは異なる脆弱性です。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5096MS 2월 보안 위협에 따른 정기 보안 업데이트 권고

- 정보노출 취약점(CVE-2020-0658, CVE-2020-0675, CVE-2020-0676, CVE-2020-0677, CVE-2020-0698, CVE-2020-0705, CVE-2020-0706, CVE-2020-0714, CVE-2020-0716, CVE-2020-0717, CVE-2020-0728, CVE-2020-0744, CVE-2020-0746, CVE-2020-0748, CVE-2020-0755, CVE-2020-0756)

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 11 Feb 2020 · Last source change 4 Aug 2024, 06:11 UTC · CWE not yet assigned

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
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-2020-2244
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceUnavailable
NVD statusNVD modified after enrichment

Missing structured fields: CWE classification. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

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-2020-2244↗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-2020-0755 · cve.blacktree.nl