CVE-2026-21244: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability (CWE-122) involves a heap-based buffer overflow in the Windows Hyper-V component of Windows 10 Version 1607 (build 10.0.14393.0). An attacker with local privileges and user interaction can exploit this flaw to execute code locally, potentially leading to full system compromise. The CVSS 3.1 vector indicates low attack complexity, required privileges, and user interaction, with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to execute arbitrary code on the affected system, potentially leading to complete system compromise including confidentiality, integrity, and availability impacts. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official patch is available from Microsoft to address this vulnerability. Users and administrators should apply the update provided in the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21244 to remediate this issue.
CVE-2026-21244: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.
CVSS v3.1
Score 7.3high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-122) involves a heap-based buffer overflow in the Windows Hyper-V component of Windows 10 Version 1607 (build 10.0.14393.0). An attacker with local privileges and user interaction can exploit this flaw to execute code locally, potentially leading to full system compromise. The CVSS 3.1 vector indicates low attack complexity, required privileges, and user interaction, with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to execute arbitrary code on the affected system, potentially leading to complete system compromise including confidentiality, integrity, and availability impacts. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official patch is available from Microsoft to address this vulnerability. Users and administrators should apply the update provided in the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21244 to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-11T21:02:05.735Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21244","vendor":"Microsoft"}]
Threat ID: 698b76004b57a58fa120a011
Added to database: 02/10/2026, 18:16:32 UTC
Last enriched: 05/12/2026, 05:12:09 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 135
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