CVE-2026-70330: 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 is a heap-based buffer overflow in the Windows DNS service on Windows 10 Version 1607 (build 10.0.14393.0). It enables an authorized attacker with local access and high privileges to elevate their privileges, potentially leading to full system compromise. The vulnerability has been assigned CVE-2026-70330 and is classified under CWE-122 (Heap-based Buffer Overflow). Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker with high privileges can exploit this heap-based buffer overflow to elevate their privileges further, potentially gaining full control over the affected system. The vulnerability affects confidentiality, integrity, and availability, as indicated by the CVSS vector (C:H/I:H/A:H). No known exploits are reported in the wild at this time.
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-2026-70330 to remediate this vulnerability.
CVE-2026-70330: 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 is a heap-based buffer overflow in the Windows DNS service on Windows 10 Version 1607 (build 10.0.14393.0). It enables an authorized attacker with local access and high privileges to elevate their privileges, potentially leading to full system compromise. The vulnerability has been assigned CVE-2026-70330 and is classified under CWE-122 (Heap-based Buffer Overflow). Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker with high privileges can exploit this heap-based buffer overflow to elevate their privileges further, potentially gaining full control over the affected system. The vulnerability affects confidentiality, integrity, and availability, as indicated by the CVSS vector (C:H/I:H/A:H). No known exploits are reported in the wild at this time.
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-2026-70330 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-04T00:04:56.036Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70330","vendor":"Microsoft"}]
Threat ID: 6a7b583fbf8831d5391567c3
Added to database: 08/11/2026, 17:13:35 UTC
Last enriched: 08/11/2026, 17:30:28 UTC
Last updated: 08/12/2026, 01:25:01 UTC
Views: 5
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