CVE-2026-70347: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the Windows Installer service on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with local authorized access can exploit this flaw to escalate privileges, potentially gaining higher system rights. The issue is tracked as CWE-122 (Heap-based Buffer Overflow). Microsoft has released an official fix to address this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate their privileges, potentially gaining higher-level access to the system. This can lead to full system compromise depending on the privileges escalated. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix from Microsoft is available and should be applied to affected systems to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70347 for patch details and update instructions.
CVE-2026-70347: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges 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 Installer service on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with local authorized access can exploit this flaw to escalate privileges, potentially gaining higher system rights. The issue is tracked as CWE-122 (Heap-based Buffer Overflow). Microsoft has released an official fix to address this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate their privileges, potentially gaining higher-level access to the system. This can lead to full system compromise depending on the privileges escalated. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix from Microsoft is available and should be applied to affected systems to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70347 for patch details and update instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-04T00:04:56.037Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70347","vendor":"Microsoft"}]
Threat ID: 6a7b5841bf8831d539156a6d
Added to database: 08/11/2026, 17:13:37 UTC
Last enriched: 08/11/2026, 17:26:51 UTC
Last updated: 08/12/2026, 02:27:28 UTC
Views: 8
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