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Home›CVE index›CVE-2021-34481
Priority reviewCritical

CVE-2021-34481

Microsoft Windows 10 Version 1507, Windows 10 Version 1607, Windows 10 Version 1809

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...

CVSS
9.8
EPSS
47.4%
98.7% percentile
CISA KEV
Not listed
Published
2021.07.17
PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV
Exploit probability47.4%
Technical severityCVSS 9.8

Vulnerability overview

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...

Affected product and versions

Product
Microsoft Windows 10 Version 1507, Windows 10 Version 1607, Windows 10 Version 1809
Affected versions
>= 10.0.10240.0 < 10.0.10240.19022, >= 10.0.14393.0 < 10.0.14393.4583, >= 10.0.17763.0 < 10.0.17763.2114, >= 10.0.0 < 10.0.17763.2114, >= 10.0.0 < 10.0.18363.1734, >= 10.0.0 < 10.0.19041.1165, >= 10.0.0 < 10.0.19042.1165, >= 10.0.0 < 10.0.19043.1165, >= 6.1.0 < 6.1.7601.25685, >= 6.3.0 < 6.3.9600.20094, >= 6.1.7601.0 < 6.1.7601.25685, >= 6.0.6003.0 < 6.0.6003.21192, >= 6.2.9200.0 < 6.2.9200.23435, >= 6.3.9600.0 < 6.3.9600.20094, 20h2, 21h1, 1607, 1809, 1909, 2004
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Microsoft Windows 10 Version 1507, Windows 10 Version 1607, Windows 10 Version 1809 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-269