CVE-2024-21339

Code execution via USB driver use-after-free

Published Feb 13, 2024 · Updated Aug 10, 2026

Use-after-free in Microsoft Windows USB Generic Parent Driver allows physically proximate attackers to execute code using a crafted USB device. Microsoft identifies the defect in Usbccgp.sys but has not disclosed the object or lifetime operation that causes the stale access. Exploitation requires physical access and composite-device processing; successful execution occurs in a kernel-mode driver.

CVSS severity6.4
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Microsoft Windows USB Generic Parent Driver allows physically proximate attackers to execute code using a crafted USB device. Microsoft identifies the defect in Usbccgp.sys but has not disclosed the object or lifetime operation that causes the stale access. Exploitation requires physical access and composite-device processing; successful execution occurs in a kernel-mode driver.

The record

CVE
CVE-2024-21339
Published
Feb 13, 2024
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-416, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.17763.0 <10.0.17763.5458

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.5458
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.2777
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.4046
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.709
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.3155
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.4046
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.5458
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.3155
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.3155
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.2322
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.5458; version=10.0.17763.0 <10.0.17763.5458

Published CVSS scores

6.4Microsoft CorporationCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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