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Full vulnerability report · 2021
CVE-2021-1675High confidence

Microsoft Windows Print Spooler Remote Code Execution Vulnerability

Microsoft · Windows

7.8HighCVSS 3.1
Recommended action
Patch now

CISA confirms exploitation in the wild and lists 2021-11-17 as the remediation due date.

Patch available
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2021-7142

CISA KEV mirrored by ENISA

Windows Print Spooler Remote Code Execution Vulnerability

EUVD state
Present in the current official mapping
Known exploitation
Recorded by ENISA since 3 Nov 2021. Evidence sources: cisa_kev.
ENISA score
7.8 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch now

CISA confirms exploitation in the wild and lists 2021-11-17 as the remediation due date.

Patch available
01

What, why and how

Microsoft Windows Print Spooler contains an unspecified vulnerability that allows for remote code execution.

What

Microsoft Windows Print Spooler contains an unspecified vulnerability that allows for remote code execution.

Why

The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may execute code or commands in the affected security context.

What

Microsoft Windows Print Spooler contains an unspecified vulnerability that allows for remote code execution.

Why

The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

How

An attacker operating through local access may attempt exploitation without authentication after a 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.
Confirmed in the wild

CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2021-11-03. Known ransomware campaign use is recorded.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
local access → Improper Authorization → execute code or commands in the affected security context
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-285 ↗

CWE-285: Improper Authorization. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

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:U/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
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.
UnauthenticatedRemote code executionCWE-285CISA KEVPublic exploit reference
A

Official authority intelligence

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

ENISA EUVD · EUVD-2021-7142Known-exploited evidence recorded

Windows Print Spooler Remote Code Execution Vulnerability

Official EUVD record ↗
Canadian Centre for Cyber Security · English · AL21-011Windows Print Spooler Vulnerability Remains Unpatched – update 3

On 29 June 2021, a proof-of-concept (POC) was released for an unpatched vulnerability in the Windows Print Spooler, colloquially named PrintNightmare.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20210609Security Bulletin 09 Jun 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 09 Jun 2021, published on 9 June 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-215Multiples vulnérabilités dans les produits Schneider

21-257-01 Bulletin de sécurité Schneider SEVD-2021-313-04 du 09 novembre 2021 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-313-04 Bulletin de sécurité Schneider SEVD-2022-067-01 du 8 mars 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-067-01 Bulletin de sécurité Schneider SEVD-2022-067-02 du 8 mars 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-067-02 Bulletin de sécurité Schneider SEVD-2022-067-03 du 8 mars 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-067-03 Référence CVE CVE-2020-12525 https://www.cve.org/CVERecord?id=CVE-2020-12525 Référence CVE CVE-2021-1675 https://www.cve.org/CVERecord?id=CVE-2021-1675 Référence CVE CVE-2021-21810 https://www.cve.org/CVERecord?id=CVE-2021-21810 Référence CVE CVE-2021-21811 https://www.cve.org/CVERecord?id=CVE-2021-21811 Référence CVE CVE-2021-21812 https://www.cve.org/CVERecord?id=CVE-2021-21812 Référence CVE CVE-2021-21813 https://www.cve.org/CVERecord?id=CVE-2021-21813 Référence CVE CVE-2021-21814 https://www.cve.org/CVERecord?id=CVE-2021-21814 Référence CVE CVE-2021-21815 https://www.cve.org/CVERecord?id=CVE-2021-21815 Référence CVE CVE-2021-21825 https://www.cve.org/CVERecord?id=CVE-2021-21825 Référence CVE CVE-2021-21826 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-853Multiples vulnérabilités dans les produits Schneider

De multiples vulnérabilités ont été découvertes dans les produits Schneider. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et un contournement de la politique de sécurité.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-622Multiples vulnérabilités dans les produits Schneider Electric

eider-electric.com/files?p_Doc_Ref=SEVD-2021-222-04 Bulletin de sécurité Schneider Electric SEVD-2021-222-05 du 10 août 2021 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-05 Bulletin de sécurité Schneider Electric SEVD-2021-222-06 du 10 août 2021 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-06 Bulletin de sécurité Schneider Electric SEVD-2021-222-07 du 10 août 2021 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-07 Bulletin de sécurité Schneider Electric SEVD-2021-222-08 du 10 août 2021 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-08 Référence CVE CVE-2021-1675 https://www.cve.org/CVERecord?id=CVE-2021-1675 Référence CVE CVE-2021-21810 https://www.cve.org/CVERecord?id=CVE-2021-21810 Référence CVE CVE-2021-21811 https://www.cve.org/CVERecord?id=CVE-2021-21811 Référence CVE CVE-2021-21812 https://www.cve.org/CVERecord?id=CVE-2021-21812 Référence CVE CVE-2021-21813 https://www.cve.org/CVERecord?id=CVE-2021-21813 Référence CVE CVE-2021-21814 https://www.cve.org/CVERecord?id=CVE-2021-21814 Référence CVE CVE-2021-21815 https://www.cve.org/CVERecord?id=CVE-2021-21815 Référence CVE CVE-2021-21825 https://www.cve.org/CVERecord?id=CVE-2021-21825 Référence CVE CVE-2021-21826 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-448Multiples vulnérabilités dans Microsoft Windows

ndows Server, version 2004 (Server Core installation) Windows Server, version 20H2 (Server Core Installation) Résumé De multiples vulnérabilités ont été corrigées dans Microsoft Windows . Elles permettent à un attaquant de provoquer un contournement de la fonctionnalité de sécurité, une élévation de privilèges, un déni de service, une exécution de code à distance et une atteinte à la confidentialité des données. 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 juin 2021 https://msrc.microsoft.com/update-guide/ Référence CVE CVE-2021-1675 https://www.cve.org/CVERecord?id=CVE-2021-1675 Référence CVE CVE-2021-26414 https://www.cve.org/CVERecord?id=CVE-2021-26414 Référence CVE CVE-2021-31199 https://www.cve.org/CVERecord?id=CVE-2021-31199 Référence CVE CVE-2021-31201 https://www.cve.org/CVERecord?id=CVE-2021-31201 Référence CVE CVE-2021-31951 https://www.cve.org/CVERecord?id=CVE-2021-31951 Référence CVE CVE-2021-31952 https://www.cve.org/CVERecord?id=CVE-2021-31952 Référence CVE CVE-2021-31953 https://www.cve.org/CVERecord?id=CVE-2021-31953 Référence CVE CVE-2021-31954 https://www.cve.org/CVERecord?id=CVE-2021-31954 Référence CVE CVE-2021-31955 https://www.cve.org/CVERecord?id=C

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-001920複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows 印刷スプーラに不備があるため、権限を昇格される脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5326MS 윈도우 Print Spooler 취약점 보안 업데이트 권고

Print Spooler에서 발생하는 원격코드실행 취약점(CVE-2021-1675) [1]

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5318MS 6월 보안 위협에 따른 정기 보안 업데이트 권고

erberos CVE-2021-31962 Kerberos AppContainer 보안 기능 우회 취약성 Windows Kernel CVE-2021-31955 Windows 커널 정보 유출 취약성 Windows Kernel CVE-2021-31951 Windows 커널 권한 상승 취약성 Windows Kernel-Mode Drivers CVE-2021-31952 Windows 커널 모드 드라이버 권한 상승 취약성 Windows MSHTML Platform CVE-2021-33742 Windows MSHTML Platform Remote Code Execution Vulnerability Windows Network File System CVE-2021-31976 NFS용 서버 정보 유출 취약성 Windows Network File System CVE-2021-31975 NFS용 서버 정보 유출 취약성 Windows Network File System CVE-2021-31974 NFS용 서버 서비스 거부 취약성 Windows NTFS CVE-2021-31956 Windows NTFS 권한 상승 취약성 Windows NTLM CVE-2021-31958 Windows NTLM 권한 상승 취약성 Windows Print Spooler Components CVE-2021-1675 Windows 인쇄 스풀러 권한 상승 취약성 Windows Remote Desktop CVE-2021-31968 Windows 원격 데스크톱 서비스 서비스 거부 취약성 Windows TCP/IP CVE-2021-31970 Windows TCP/IP 드라이버 보안 기능 우회 취약성 ##### □ 작성 : 침해사고분석단 취약점분석팀

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 8 Jun 2021 · Last source change 12 Aug 2026, 03:55 UTC · CWE-285 · Improper Authorization

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-2021-7142
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCISA KEV
NVD statusNVD enriched

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

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    10.0.0 < 10.0.17763.1999; 10.0.0 < 10.0.18363.1621; 10.0.0 < 10.0.19043.1052; 10.0.0 < 10.0.19041.1052; 10.0.0 < 10.0.19042.1052 · 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
    Windows 10 Version 1809: 10.0.0 < 10.0.17763.1999; Windows Server 2019: 10.0.0 < 10.0.17763.1999; Windows Server 2019 (Server Core installation): 10.0.0 < 10.0.17763.1999; Windows 10 Version 1909: 10.0.0 < 10.0.18363.1621; Windows 10 Version 21H1: 10.0.0 < 10.0.19043.1052; Windows 10 Version 2004: 10.0.0 < 10.0.19041.1052; Windows Server version 2004: 10.0.0 < 10.0.19041.1052; Windows 10 Version 20H2: 10.0.0 < 10.0.19042.1052; Windows Server version 20H2: 10.0.0 < 10.0.19042.1052; Windows 10 Version 1507: 10.0.0 < 10.0.10240.18967; Windows 10 Version 1607: 10.0.0 < 10.0.14393.4467; Windows Server 2016: 10.0.0 < 10.0.14393.4467; Windows Server 2016 (Server Core installation): 10.0.0 < 10.0.14393.4467; Windows 7: 6.1.0 < 6.1.7601.25632; Windows 7 Service Pack 1: 6.1.0 < 6.1.7601.25632; Windows 8.1: 6.3.0 < 6.3.9600.20045, 6.3.0 < 6.3.9600.20044; Windows Server 2008 Service Pack 2: 6.0.0 < 6.0.6003.21137; Windows Server 2008 Service Pack 2 (Server Core installation): 6.0.0 < 6.0.6003.21137; Windows Server 2008 Service Pack 2: 6.0.0 < 6.0.6003.21137; Windows Server 2008 R2 Service Pack 1: 6.1.0 < 6.1.7601.25632; Windows Server 2008 R2 Service Pack 1 (Server Core installation): 6.0.0 < 6.1.7601.25632; Windows Server 2012: 6.2.0 < 6.2.9200.23372; Windows Server 2012 (Server Core installation): 6.2.0 < 6.2.9200.23372; Windows Server 2012 R2: 6.3.0 < 6.3.9600.20045, 6.3.0 < 6.3.9600.20044; Windows Server 2012 R2 (Server Core installation): 6.3.0 < 6.3.9600.20045, 6.3.0 < 6.3.9600.20044 · 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 ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Added to CISA KEV
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2021-7142↗CISA KEV record↗CVE authority or vendor reference↗Public exploit 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-2021-1675 · cve.blacktree.nl