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CVE-2021-34481 Public exploit High · 8.8 EPSS 47.7%

Windows Print Spooler Remote Code Execution Vulnerability

Microsoft · Windows 10 Version 1507

Summary

The Windows Print Spooler service in Microsoft Windows 10 Version 1507 improperly performs privileged file operations, creating a remote code execution flaw. An attacker with network access and low-privilege authenticated credentials, requiring no user interaction, could run arbitrary code with SYSTEM privileges and thereby install programs, view, change or delete data, or create accounts with full user rights.

Official description · CVE.org

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.

Breakdown
81.6 / 100
Exploited
Yes, in VulnCheck KEV
Reports
1
Tactics
0/15

First seen exploited 17 months after disclosure. Public exploit code (PoC-in-GitHub) appeared 26 days after disclosure.

  1. Disclosedday 0
  2. Public exploit codePoC-in-GitHub+26 days
  3. First seen exploitedVulnCheck KEV evidence+17 mo

techniques

No techniques linked

No ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.

What security researchers reported

Named in 1 threat report
1 reportDragos

Reports are matched by finding the exact id CVE-2021-34481 in their text; nobody has reviewed the match. One passage is shown per report, at most 320 characters, linked to the original.

Also mentioned in 5 community threat pulses (AlienVault OTX)

Weaker evidence

Pulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.

References

2 links, grouped by NVD tag

vendor-advisory 1

msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34481

x_refsource_MISC 1

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34481
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