CVE-2026-49793: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the Windows Resilient File System (ReFS) on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with local privileges can exploit this flaw to execute arbitrary code on the affected system. The vulnerability is tracked as CWE-122. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized local attacker to execute arbitrary code with the privileges of the affected user, potentially leading to full system compromise. The CVSS v3.1 base score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49793 to remediate this vulnerability.
CVE-2026-49793: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in the Windows Resilient File System (ReFS) on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with local privileges can exploit this flaw to execute arbitrary code on the affected system. The vulnerability is tracked as CWE-122. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized local attacker to execute arbitrary code with the privileges of the affected user, potentially leading to full system compromise. The CVSS v3.1 base score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49793 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-01T17:02:37.208Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49793","vendor":"Microsoft"}]
Threat ID: 6a566f6d68715ace43e6b54b
Added to database: 07/14/2026, 17:18:37 UTC
Last enriched: 08/13/2026, 14:24:09 UTC
Last updated: 08/28/2026, 22:52:11 UTC
Views: 109
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