CVE-2026-70062
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Double Free in Windows Libarchive Allows Remote Code Execution

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description
Double free in Windows Libarchive allows an unauthorized attacker to execute code over a network.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-16
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-70062
EUVD
EUVD-2026-99146

Affected Vendors & Products

Showing 14 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows 10 Version 21H2 10.0.19044.0
Microsoft Windows 10 Version 22H2 10.0.19045.0
Microsoft Windows 11 version 23H2 10.0.22631.0
Microsoft Windows 11 Version 23H2 10.0.22631.0
Microsoft Windows 11 Version 24H2 10.0.26100.0
Microsoft Windows 11 Version 25H2 10.0.26200.0
Microsoft Windows 11 version 26H1 10.0.28000.0
Microsoft Windows 11 Version 26H2 10.0.26300.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-415 The product calls free() twice on the same memory address.

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Executive Summary

This vulnerability is a double free issue in Windows Libarchive. A double free occurs when a program frees the same memory twice, which can lead to memory corruption. An unauthorized attacker could exploit this to execute arbitrary code over a network.

Impact Analysis

An attacker could remotely execute malicious code on your system if it is vulnerable. This could allow them to take control of your device, steal data, install malware, or perform other unauthorized actions.

Compliance Impact

This vulnerability allows remote code execution, which could lead to unauthorized access to sensitive data. This may violate compliance requirements under GDPR (data protection) and HIPAA (health information security) by enabling data breaches or unauthorized processing.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the double free vulnerability in Windows Libarchive. Monitor Microsoft's update guide for the specific patch release.

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