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Full vulnerability report · 2022
CVE-2022-37958High confidence

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability

Microsoft · Windows 10 Version 1809

8.1HighCVSS 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:Critical, raised one band.upgradedsince 5 Oct 2026

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 86.14% 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 Windows 10 Version 1809 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 3 daysRemediation target: Within 90 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-2022-40565

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

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability

What

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution 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 execute code or commands in the affected security context.

What

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution 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 execute code or commands in the affected security context.

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 → execute code or commands in the affected security context
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
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:H/PR:N/UI:N/S:U/C:H/I:H/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.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.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.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
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
NetworkUnauthenticatedRemote code execution
A

Official authority intelligence

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

Canadian Centre for Cyber Security · English · AV22-702Microsoft security advisory – December 2022 monthly rollup – Update 1 (AV22-702)

On 13 December 2022, Microsoft published Security Updates to address vulnerabilities in multiple products. Included were critical updates for the following: Microsoft has indicated that CVE-2022-44698 has been actively exploited.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20220914Security Bulletin 14 Sep 2022

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 14 Sep 2022, published on 14 September 2022. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-839Multiples vulnérabilités dans Microsoft Windows

2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-35841 Bulletin de sécurité Microsoft CVE-2022-37954 du 13 septembre 2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37954 Bulletin de sécurité Microsoft CVE-2022-37955 du 13 septembre 2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37955 Bulletin de sécurité Microsoft CVE-2022-37956 du 13 septembre 2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37956 Bulletin de sécurité Microsoft CVE-2022-37957 du 13 septembre 2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37957 Bulletin de sécurité Microsoft CVE-2022-37958 du 13 septembre 2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37958 Bulletin de sécurité Microsoft CVE-2022-37959 du 13 septembre 2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37959 Bulletin de sécurité Microsoft CVE-2022-37964 du 13 septembre 2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37964 Bulletin de sécurité Microsoft CVE-2022-37969 du 13 septembre 2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37969 Bulletin de sécurité Microsoft CVE-2022-38004 du 13 septembre 2022 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-38004 Bulletin de séc

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2022-002418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、SPNEGO Extended Negotiation (NEGOEX) Security Mechanism に不備があるため、情報を公開される脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5802MS 12월 보안 위협에 따른 정기 보안 업데이트 권고

Microsoft Exchange Server 스푸핑 취약점 Microsoft Exchange Server CVE-2022-41078 Microsoft Exchange Server 스푸핑 취약점 Windows Fax Compose Form CVE-2022-41077 Windows 팩스 작성 양식 권한 상승 취약점 Windows PowerShell CVE-2022-41076 PowerShell 원격 코드 실행 취약점 Microsoft Graphics Component CVE-2022-41074 Windows 그래픽 구성 요소 정보 노출 취약점 Microsoft Office CVE-2022-41043 Microsoft Office 정보 노출 취약점 Active Directory Domain Services CVE-2022-38042 Active Directory 도메인 서비스 권한 상승 취약점 Windows Portable Device Enumerator Service CVE-2022-38032 Windows Portable Device Enumerator Service 보안 기능 우회 취약점 Windows Kerberos CVE-2022-37967 Windows Kerberos 권한 상승 취약점 SPNEGO Extended Negotiation CVE-2022-37958 SPNEGO Extended Negotiation(NEGOEX) 보안 메커니즘 원격 코드 실행 취약점 Windows Defender Credential Guard CVE-2022-34704 Windows Defender Credential Guard 정보 노출 취약점 Microsoft Graphics Component CVE-2022-26806 Microsoft Office 그래픽 원격 코드 실행 취약점 Microsoft Graphics Component CVE-2022-26805 Microsoft Office 그래픽 원격 코드 실행 취약점 Microsoft Graphics Component CVE-2022-26804 Microsoft Office 그래픽 원격 코드 실행 취약점 Microsoft Office Outlook CVE-2022-24480 Android Outlook 권한 상승 취약점 Windows Certificates ADV220005 악의적으로 사용되는 Microsoft 서명된 드라이버에 대한 지침 ##### □ 작성 : 취약점분석팀

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5723MS 9월 보안 위협에 따른 정기 보안 업데이트 권고

rosoft Office Visio 원격 코드 실행 취약성 Microsoft Office CVE-2022-37962 Microsoft PowerPoint 원격 코드 실행 취약성 Microsoft Office SharePoint CVE-2022-38008 Microsoft SharePoint Server 원격 코드 실행 취약성 Microsoft Office SharePoint CVE-2022-38009 Microsoft SharePoint Server 원격 코드 실행 취약성 Microsoft Office SharePoint CVE-2022-37961 Microsoft SharePoint Server 원격 코드 실행 취약성 Microsoft Office SharePoint CVE-2022-35823 Microsoft SharePoint 원격 코드 실행 취약성 Network Device Enrollment Service (NDES) CVE-2022-37959 NDES(네트워크 장치 등록 서비스) 보안 기능 우회 취약성 Microsoft Windows Codecs Library CVE-2022-38011 Raw Image Extension Remote Code Execution Vulnerability SPNEGO Extended Negotiation CVE-2022-37958 SPNEGO NEGOEX(Extended Negotiation) 보안 메커니즘 정보 공개 취약성 Visual Studio Code CVE-2022-38020 Visual Studio Code 권한 상승 취약성 Microsoft Windows ALPC CVE-2022-34725 Windows ALPC 권한 상승 취약성 Windows Distributed File System (DFS) CVE-2022-34719 Windows DFS(분산 파일 시스템) 권한 상승 취약성 Role: DNS Server CVE-2022-34724 Windows DNS 서버 서비스 거부 취약성 Windows DPAPI (Data Protection Application Programming Interface) CVE-2022-34723 Windows DPAPI(데이터 보호 응용 프로그램 프로그래밍 인터페이스) 정보 공개 취약성 Role: Windows Fax Service CVE-2022-38004 Windows Fax 서비스 원격 코드 실행 취약성 Microsoft Graphics Component CVE-2022-34729 Windows GDI 권한 상승 취약성 Windows IKE Extension CVE-2022-34721 Windows IKE(Internet

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
  • Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.3406, 10.0.0 < 10.0.17763.3406
  • Windows Server 2019: 10.0.17763.0 < 10.0.17763.3406
  • Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.3406
  • Windows 10 Version 21H1: 10.0.0 < 10.0.19043.2006
  • Windows Server 2022: 10.0.20348.0 < 10.0.20348.1006
  • Windows 10 Version 20H2: 10.0.0 < 10.0.19042.2006
  • Windows 11 version 21H2: 10.0.0 < 10.0.22000.978
  • Windows 10 Version 21H2: 10.0.19043.0 < 10.0.19044.2006
  • Windows 10 Version 1507: 10.0.10240.0 < 10.0.10240.19444
  • Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.5356
  • Windows Server 2016: 10.0.14393.0 < 10.0.14393.5356
  • Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.5356
  • Windows 7: 6.1.0 < 6.1.7601.26115
  • Windows 7 Service Pack 1: 6.1.0 < 6.1.7601.26115
  • Windows 8.1: 6.3.0 < 6.3.9600.20571
  • Windows Server 2008 R2 Service Pack 1: 6.1.7601.0 < 6.1.7601.26115
  • Windows Server 2008 R2 Service Pack 1 (Server Core installation): 6.1.7601.0 < 6.1.7601.26115
  • Windows Server 2012: 6.2.9200.0 < 6.2.9200.23865
  • Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.23865
  • Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.20571
  • Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.20571
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 13 Sept 2022 · Last source change 11 Mar 2025, 16:10 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-2022-40565
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-2022-40565↗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-2022-37958 · cve.blacktree.nl