CVE-2024-38063Public exploitNetwork attack vector

Unauthenticated code execution via IPv6 integer underflow

Published Aug 13, 2024 · Updated Jul 10, 2025

Remote code execution in Microsoft Windows TCP/IP allows remote attackers to execute code by repeatedly sending crafted IPv6 packets. The IPv6 packet-processing path in tcpip.sys underflows an integer while handling crafted packet sequences, causing memory corruption. Any IPv6-enabled affected host is reachable without authentication or user interaction, and successful exploitation grants arbitrary code execution.

CVSS severity9.8
Critical
EPSS probability70.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Microsoft Windows TCP/IP allows remote attackers to execute code by repeatedly sending crafted IPv6 packets. The IPv6 packet-processing path in tcpip.sys underflows an integer while handling crafted packet sequences, causing memory corruption. Any IPv6-enabled affected host is reachable without authentication or user interaction, and successful exploitation grants arbitrary code execution.

The record

CVE
CVE-2024-38063
Published
Aug 13, 2024
Updated
Jul 10, 2025
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-191, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2025Record 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=10.0.10240.0 <10.0.10240.20751

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.20751
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.6293
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.7259
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.1457
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.3197
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.25031
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.25031
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.4780
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1085
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.7259
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.4037
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.27277
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.27277
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.4780
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.22134
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.6293
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.4037
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.4037
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.7259
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.22825
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.2700
Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.6293
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.22134
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.22825

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/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.

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No observations available

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

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
T1210Exploitation of Remote Services

Public exploit references

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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