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Full vulnerability report · 2022
CVE-2022-21986High confidence

.NET Denial of Service Vulnerability

Microsoft · Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)

7.5HighCVSS 3.1
Recommended action
Within 7 days

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

Fix not verified
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.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 3.74% for the current model date.

Compensating controls

  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8) and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  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.

Open-source package ranges23 source-attributed ranges

These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.

Ecosystem and packageAffected rangeFirst fixed versionEvidence
NuGetMicrosoft.AspNetCore.App.Runtime.linux-armECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-armECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-arm64ECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-arm64ECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-armECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-armECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-arm64ECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-arm64ECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-x64ECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-x64ECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-x64ECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.linux-x64ECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.osx-arm64ECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.osx-x64ECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.osx-x64ECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.win-armECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.win-armECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.win-arm64ECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.win-arm64ECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.win-x64ECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.win-x64ECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.win-x86ECOSYSTEM: introduced 5.0.0; fixed 5.0.145.0.14OSV record ↗aggregator derived · 4 Dec 2024
NuGetMicrosoft.AspNetCore.App.Runtime.win-x86ECOSYSTEM: introduced 6.0.0; fixed 6.0.26.0.2OSV record ↗aggregator derived · 4 Dec 2024
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-2022-7179

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 actionWithin 7 days

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

Fix not verified
01

What, why and how

.NET Denial of Service Vulnerability

What

.NET Denial of Service Vulnerability

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 a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

.NET Denial of Service Vulnerability

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 a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

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
a network path → vulnerable operation → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

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

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of service
A

Official authority intelligence

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

Cyber Security Agency of Singapore · English · CSA-SB-20220216Security Bulletin 16 Feb 2022

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 16 Feb 2022, published on 16 February 2022. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-131Vulnérabilité dans Microsoft .Net

Une vulnérabilité a été corrigée dans Microsoft .Net . Elle permet à un attaquant de provoquer un déni de service à distance.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-132Multiples vulnérabilités dans les produits Microsoft

écution de code à distance. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Microsoft du 08 février 2022 https://msrc.microsoft.com/update-guide/ Référence CVE CVE-2022-21844 https://www.cve.org/CVERecord?id=CVE-2022-21844 Référence CVE CVE-2022-21926 https://www.cve.org/CVERecord?id=CVE-2022-21926 Référence CVE CVE-2022-21927 https://www.cve.org/CVERecord?id=CVE-2022-21927 Référence CVE CVE-2022-21957 https://www.cve.org/CVERecord?id=CVE-2022-21957 Référence CVE CVE-2022-21965 https://www.cve.org/CVERecord?id=CVE-2022-21965 Référence CVE CVE-2022-21986 https://www.cve.org/CVERecord?id=CVE-2022-21986 Référence CVE CVE-2022-21988 https://www.cve.org/CVERecord?id=CVE-2022-21988 Référence CVE CVE-2022-21991 https://www.cve.org/CVERecord?id=CVE-2022-21991 Référence CVE CVE-2022-22003 https://www.cve.org/CVERecord?id=CVE-2022-22003 Référence CVE CVE-2022-22004 https://www.cve.org/CVERecord?id=CVE-2022-22004 Référence CVE CVE-2022-22709 https://www.cve.org/CVERecord?id=CVE-2022-22709 Référence CVE CVE-2022-22716 https://www.cve.org/CVERecord?id=CVE-2022-22716 Référence CVE CVE-2022-23252 https://www.cve.org/CVERecord?id=CVE-2022-23252 Référence CVE CVE-2022-23254 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2022-001332.NET および Microsoft Visual Studio におけるサービス運用妨害 (DoS) の脆弱性

.NET および Microsoft Visual Studio には、.NET に不備があるため、サービス運用妨害 (DoS) の脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5501MS 2월 보안 위협에 따른 정기 보안 업데이트 권고

ows 인쇄 스풀러 권한 상승 취약성 Windows Win32K CVE-2022-21996 Win32k 권한 상승 취약성 Role: Windows Hyper-V CVE-2022-21995 Windows Hyper-V 원격 코드 실행 취약성 Windows DWM Core Library CVE-2022-21994 Windows DWM 핵심 라이브러리 권한 상승 취약성 Windows Kernel-Mode Drivers CVE-2022-21993 NFS ONCRPC XDR 드라이버용 Windows 서비스 정보 공개 취약성 Windows Kernel CVE-2022-21992 Windows 모바일 장치 관리 원격 코드 실행 취약성 Visual Studio Code CVE-2022-21991 Visual Studio Code 원격 개발 확장 원격 코드 실행 취약성 Windows Kernel CVE-2022-21989 Windows 커널 권한 상승 취약성 Microsoft Office Visio CVE-2022-21988 Microsoft Office Visio 원격 코드 실행 취약성 Microsoft Office SharePoint CVE-2022-21987 Microsoft SharePoint Server 스푸핑 취약성 Kestrel Web Server CVE-2022-21986 .NET 서비스 거부 취약성 Windows Remote Access Connection Manager CVE-2022-21985 Windows 원격 액세스 연결 관리자 정보 유출 취약성 Role: DNS Server CVE-2022-21984 Windows DNS 서버 원격 코드 실행 취약성 Windows Common Log File System Driver CVE-2022-21981 Windows 공용 로그 파일 시스템 드라이버 권한 상승 취약성 Roaming Security Rights Management Services CVE-2022-21974 로밍 보안 권리 관리 서비스 원격 코드 실행 취약성 Windows Remote Procedure Call Runtime CVE-2022-21971 Windows 작동 시간 원격 코드 실행 취약성 Microsoft Office SharePoint CVE-2022-21968 Microsoft SharePoint Server 보안 기능 우회 취약성 Microsoft Teams CVE-2022-21965 Microsoft Teams 서비스 거부 취약성 Microsoft Dynamics CVE-2022-21957 Microsoft Dynamics 365(온-프레미스) 원격 코드 실행 취약성 Microsof

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.
Fix not verified
Affected
  • Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8): 15.0.0 < 16.9.17
  • Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10): 16.11.0 < 16.11.10
  • Microsoft Visual Studio 2022 version 17.0: 17.0.0 < 17.0.6
  • Visual Studio 2019 for Mac version 8.10: 8.1.0 < 8.10.18
  • .NET 5.0: 5.0.0 < 5.0.14
  • .NET 6.0: 6.0.0 < 6.0.2
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 9 Feb 2022 · Last source change 2 Jan 2025, 18:28 UTC · CWE not yet assigned

CVE recordCVE.org · 5.1
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-2022-7179
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
ENISA EUVD · EUVD-2022-7179↗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-2022-21986 · cve.blacktree.nl