CVE-2026-70304: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the Windows DNS component on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with authorized local access and high privileges can exploit this flaw to elevate their privileges on the system. The vulnerability is tracked as CWE-122. Microsoft has published an official fix for this issue, mitigating the risk.
Potential Impact
An authorized attacker with local access and high privileges can exploit this vulnerability to elevate their privileges, potentially gaining higher system-level access. The vulnerability affects confidentiality, integrity, and availability as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70304 to remediate this vulnerability.
CVE-2026-70304: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 6.7medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in the Windows DNS component on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with authorized local access and high privileges can exploit this flaw to elevate their privileges on the system. The vulnerability is tracked as CWE-122. Microsoft has published an official fix for this issue, mitigating the risk.
Potential Impact
An authorized attacker with local access and high privileges can exploit this vulnerability to elevate their privileges, potentially gaining higher system-level access. The vulnerability affects confidentiality, integrity, and availability as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70304 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-04T00:01:20.931Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70304","vendor":"Microsoft"}]
Threat ID: 6a7b583cbf8831d539156722
Added to database: 08/11/2026, 17:13:32 UTC
Last enriched: 08/11/2026, 17:43:55 UTC
Last updated: 08/12/2026, 00:12:10 UTC
Views: 3
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