CVE-2026-69429: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1809
Description
CVE-2026-69429 is a heap-based buffer overflow vulnerability in the Windows IKE Extension affecting multiple builds of Microsoft Windows 10 Version 1809 and later. This flaw allows an authorized attacker to execute code remotely over a network. The vulnerability has a high severity rating with a CVSS score of 7.5. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-69429) involves a heap-based buffer overflow in the Windows IKE Extension component of Microsoft Windows 10 Version 1809 and related builds. The flaw enables an attacker with limited privileges and network access to execute arbitrary code remotely. The CVSS 3.1 vector indicates network attack vector, high complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized attacker to execute arbitrary code remotely on affected Windows 10 systems, potentially leading to full system compromise including complete confidentiality, integrity, and availability loss.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69429 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T20:59:32.784Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69429","vendor":"Microsoft"}]
Threat ID: 6aa044f8acd9273b49fa8065
Added to database: 09/08/2026, 17:25:12 UTC
Last enriched: 10/16/2026, 21:12:04 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 29
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