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CVE-2021-34481

Windows Print Spooler Remote Code Execution Vulnerability

HIGH
8.8
CVSS Score
Published: July 16, 2021 at 08:19 PM UTC
Updated: August 10, 2026 at 04:28 PM UTC
17 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows Server 2012

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Severity
HIGH8.8
Exploit prediction
EPSS 48%

Description

<p>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.</p> <p><strong>UPDATE</strong> 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 <a href="https://support.microsoft.com/help/5005652">KB5005652</a>.</p>

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows 10· Microsoft
95%
160718091909200420h221h1
Windows 10 1507· Microsoft
95%
10.0.10240.0 ≤ v < 10.0.10240.1902210.0.10240.0
Affected range stops below 10.0.10240.19022, so it looks safe — our inference, not a vendor statement
Windows 10 1607· Microsoft
95%
10.0.14393.0 ≤ v < 10.0.14393.458310.0.14393.0
Affected range stops below 10.0.14393.4583, so it looks safe — our inference, not a vendor statement
Windows 10 1809· Microsoft
95%
10.0.0 ≤ v < 10.0.17763.211410.0.0 ≤ v < 10.0.19041.116510.0.17763.0 ≤ v < 10.0.17763.211410.0.010.0.17763.0
Affected range stops below 10.0.17763.2114, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.19041.1165, so it looks safe — our inference, not a vendor statement
Windows 10 1909· Microsoft
95%
10.0.0 ≤ v < 10.0.18363.173410.0.0
Affected range stops below 10.0.18363.1734, so it looks safe — our inference, not a vendor statement
Windows 7· Microsoft
95%
6.1.0 ≤ v < 6.1.7601.256856.1.0sp1
Affected range stops below 6.1.7601.25685, so it looks safe — our inference, not a vendor statement
Windows 8-1· Microsoft
95%
6.3.0 ≤ v < 6.3.9600.200946.3.0
Affected range stops below 6.3.9600.20094, so it looks safe — our inference, not a vendor statement
Windows Rt 8-1· Microsoft
95%
All versions
Windows Server 2004· Microsoft
95%
10.0.0 ≤ v < 10.0.19041.116510.0.0
Affected range stops below 10.0.19041.1165, so it looks safe — our inference, not a vendor statement
Windows Server 2008· Microsoft
95%
6.0.6003.0 ≤ v < 6.0.6003.211926.1.7601.0 ≤ v < 6.1.7601.256856.0.6003.06.1.7601.0r2 sp1sp2
Affected range stops below 6.0.6003.21192, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.7601.25685, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

PatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34481
Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34481

CVSS

8.8HIGHmicrosoft
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-269

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