CVE-2021-34481

highpriority · attend · 57EPSS 0.477 · 99 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

47.7% (99th) EPSS

CVSS 7.5 · high

Is it mine?

147 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · msrc_csaf

EPSS · scored 2026-10-22

A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. UPDATE August 10, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. This security update changes the Point and Print default behavior; please see KB5005652.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedWindows 10 Version 1607 for 32-bit Systemsmsrc_csaf
10.0.14393.4583:Security Update:https://support.microsoft.com/help/5005043
https://support.microsoft.com/help/5005043
FixedWindows 10 Version 1607 for x64-based Systemsmsrc_csaf
10.0.14393.4583:Security Update:https://support.microsoft.com/help/5005043
https://support.microsoft.com/help/5005043
FixedWindows 10 Version 1809 for 32-bit Systemsmsrc_csaf
10.0.17763.2114:Security Update:https://support.microsoft.com/help/5005030
https://support.microsoft.com/help/5005030
FixedWindows 10 Version 1809 for ARM64-based Systemsmsrc_csaf
10.0.17763.2114:Security Update:https://support.microsoft.com/help/5005030
https://support.microsoft.com/help/5005030
FixedWindows 10 Version 1809 for x64-based Systemsmsrc_csaf
10.0.17763.2114:Security Update:https://support.microsoft.com/help/5005030
https://support.microsoft.com/help/5005030
FixedWindows 10 Version 1909 for 32-bit Systemsmsrc_csaf
10.0.18363.1734:Security Update:https://support.microsoft.com/help/5005031
https://support.microsoft.com/help/5005031
FixedWindows 10 Version 1909 for ARM64-based Systemsmsrc_csaf
10.0.18363.1734:Security Update:https://support.microsoft.com/help/5005031
https://support.microsoft.com/help/5005031
FixedWindows 10 Version 1909 for x64-based Systemsmsrc_csaf
10.0.18363.1734:Security Update:https://support.microsoft.com/help/5005031
https://support.microsoft.com/help/5005031
FixedWindows 10 Version 2004 for 32-bit Systemsmsrc_csaf
10.0.19041.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033
FixedWindows 10 Version 2004 for ARM64-based Systemsmsrc_csaf
10.0.19041.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033
FixedWindows 10 Version 2004 for x64-based Systemsmsrc_csaf
10.0.19041.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033
FixedWindows 10 Version 20H2 for 32-bit Systemsmsrc_csaf
10.0.19042.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033
FixedWindows 10 Version 20H2 for ARM64-based Systemsmsrc_csaf
10.0.19042.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033
FixedWindows 10 Version 21H1 for 32-bit Systemsmsrc_csaf
10.0.19043.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033
FixedWindows 10 Version 21H1 for ARM64-based Systemsmsrc_csaf
10.0.19043.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033
FixedWindows 10 Version 21H1 for x64-based Systemsmsrc_csaf
10.0.19043.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033
FixedWindows 10 for 32-bit Systemsmsrc_csaf
10.0.10240.19022:Security Update:https://support.microsoft.com/help/5005040
https://support.microsoft.com/help/5005040
FixedWindows 10 for x64-based Systemsmsrc_csaf
10.0.10240.19022:Security Update:https://support.microsoft.com/help/5005040
https://support.microsoft.com/help/5005040
FixedWindows 7 for 32-bit Systems Service Pack 1msrc_csaf
6.1.7601.25685:Monthly Rollup:https://support.microsoft.com/help/5005088
https://support.microsoft.com/help/5005088
FixedWindows 7 for x64-based Systems Service Pack 1msrc_csaf
6.1.7601.25685:Monthly Rollup:https://support.microsoft.com/help/5005088
https://support.microsoft.com/help/5005088
FixedWindows 8.1 for 32-bit systemsmsrc_csaf
6.3.9600.20094:Monthly Rollup:https://support.microsoft.com/help/5005076
https://support.microsoft.com/help/5005076
FixedWindows 8.1 for x64-based systemsmsrc_csaf
6.3.9600.20094:Monthly Rollup:https://support.microsoft.com/help/5005076
https://support.microsoft.com/help/5005076
FixedWindows RT 8.1msrc_csaf
6.3.9600.20094:Monthly Rollup:https://support.microsoft.com/help/5005076
https://support.microsoft.com/help/5005076
FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1msrc_csaf
6.1.7601.25685:Monthly Rollup:https://support.microsoft.com/help/5005088
https://support.microsoft.com/help/5005088
FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)msrc_csaf
6.1.7601.25685:Monthly Rollup:https://support.microsoft.com/help/5005088
https://support.microsoft.com/help/5005088
FixedWindows Server 2008 for 32-bit Systems Service Pack 2msrc_csaf
6.0.6003.21192:Monthly Rollup:https://support.microsoft.com/help/5005090
https://support.microsoft.com/help/5005090
FixedWindows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)msrc_csaf
6.0.6003.21192:Monthly Rollup:https://support.microsoft.com/help/5005090
https://support.microsoft.com/help/5005090
FixedWindows Server 2008 for x64-based Systems Service Pack 2msrc_csaf
6.0.6003.21192:Monthly Rollup:https://support.microsoft.com/help/5005090
https://support.microsoft.com/help/5005090
FixedWindows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)msrc_csaf
6.0.6003.21192:Monthly Rollup:https://support.microsoft.com/help/5005090
https://support.microsoft.com/help/5005090
FixedWindows Server 2012msrc_csaf
6.2.9200.23435:Security Only:https://support.microsoft.com/help/5005094
https://support.microsoft.com/help/5005094
FixedWindows Server 2012 (Server Core installation)msrc_csaf
6.2.9200.23435:Security Only:https://support.microsoft.com/help/5005094
https://support.microsoft.com/help/5005094
FixedWindows Server 2012 R2msrc_csaf
6.3.9600.20094:Monthly Rollup:https://support.microsoft.com/help/5005076
https://support.microsoft.com/help/5005076
FixedWindows Server 2012 R2 (Server Core installation)msrc_csaf
6.3.9600.20094:Monthly Rollup:https://support.microsoft.com/help/5005076
https://support.microsoft.com/help/5005076
FixedWindows Server 2016msrc_csaf
10.0.14393.4583:Security Update:https://support.microsoft.com/help/5005043
https://support.microsoft.com/help/5005043
FixedWindows Server 2016 (Server Core installation)msrc_csaf
10.0.14393.4583:Security Update:https://support.microsoft.com/help/5005043
https://support.microsoft.com/help/5005043
FixedWindows Server 2019msrc_csaf
10.0.17763.2114:Security Update:https://support.microsoft.com/help/5005030
https://support.microsoft.com/help/5005030
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.2114:Security Update:https://support.microsoft.com/help/5005030
https://support.microsoft.com/help/5005030
FixedWindows Server, version 2004 (Server Core installation)msrc_csaf
10.0.19041.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033
FixedWindows Server, version 20H2 (Server Core Installation)msrc_csaf
10.0.19042.1165:Security Update:https://support.microsoft.com/help/5005033
https://support.microsoft.com/help/5005033

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:P/E:Hsecondary · CVSS-BT (t0sche)

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:Csecondary · Microsoft Security Response Center US

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:Csecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · NVD / NIST USexploitability 3.9 · impact 5.9

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-269USprimaryCWE-264US

exploits (1)

Public proof-of-concept and weaponised exploit code.

vpn28/CVE-2021-34481Check patch for CVE-2021-34481PoC · poc_in_github

affected products (147)

Products and version ranges known to be affected.

Microsoft Windows 10 Version 150710.0.10240.0 → 10.0.10240.19022enisa_euvdEU
Microsoft Windows 10 Version 160710.0.14393.0 → 10.0.14393.4583enisa_euvdEU
Microsoft Windows 10 Version 180910.0.0 → 10.0.17763.2114enisa_euvdEU
Microsoft Windows 10 Version 180910.0.17763.0 → 10.0.17763.2114enisa_euvdEU
Microsoft Windows 10 Version 190910.0.0 → 10.0.18363.1734enisa_euvdEU
Microsoft Windows 10 Version 200410.0.0 → 10.0.19041.1165enisa_euvdEU
Microsoft Windows 10 Version 20H210.0.0 → 10.0.19042.1165enisa_euvdEU
Microsoft Windows 10 Version 21H110.0.0 → 10.0.19043.1165enisa_euvdEU
Microsoft Windows 76.1.0 → 6.1.7601.25685enisa_euvdEU
Microsoft Windows 7 Service Pack 16.1.0 → 6.1.7601.25685enisa_euvdEU
Microsoft Windows 8.16.3.0 → 6.3.9600.20094enisa_euvdEU
Microsoft Windows Server 2008 R2 Service Pack 16.1.7601.0 → 6.1.7601.25685enisa_euvdEU
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0 → 6.1.7601.25685enisa_euvdEU
Microsoft Windows Server 2008 Service Pack 26.0.6003.0 → 6.0.6003.21192enisa_euvdEU
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0 → 6.0.6003.21192enisa_euvdEU
Microsoft Windows Server 20126.2.9200.0 → 6.2.9200.23435enisa_euvdEU
Microsoft Windows Server 2012 (Server Core installation)6.2.9200.0 → 6.2.9200.23435enisa_euvdEU
Microsoft Windows Server 2012 R26.3.9600.0 → 6.3.9600.20094enisa_euvdEU
Microsoft Windows Server 2012 R2 (Server Core installation)6.3.9600.0 → 6.3.9600.20094enisa_euvdEU
Microsoft Windows Server 201610.0.14393.0 → 10.0.14393.4583enisa_euvdEU

showing 20 of 147

advisories (1)

Vendor and ecosystem advisories describing this.

msrc_CVE-2021-34481Windows Print Spooler Remote Code Execution Vulnerability2021-07-15csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu msrc_csaf NVD CVE.org MITRE

published 2021-07-16modified 2026-08-10

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references (8)

External citations — patches, advisories, analysis.

scry

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