CVE-2026-65774: 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 is a heap-based buffer overflow in the Windows Installer on Windows 10 Version 1607 (build 10.0.14393.0). It enables an attacker with local authorized access to escalate privileges, potentially gaining higher system rights. The vulnerability is tracked as CWE-122 and has a CVSS 3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability, as referenced in their security update guide.
Potential Impact
An authorized local attacker can exploit this heap-based buffer overflow to elevate their privileges on the affected Windows 10 Version 1607 system. This could allow the attacker to execute code with higher privileges, compromising system security and potentially leading to full system control.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the security update provided by Microsoft as soon as possible to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-65774: 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 is a heap-based buffer overflow in the Windows Installer on Windows 10 Version 1607 (build 10.0.14393.0). It enables an attacker with local authorized access to escalate privileges, potentially gaining higher system rights. The vulnerability is tracked as CWE-122 and has a CVSS 3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability, as referenced in their security update guide.
Potential Impact
An authorized local attacker can exploit this heap-based buffer overflow to elevate their privileges on the affected Windows 10 Version 1607 system. This could allow the attacker to execute code with higher privileges, compromising system security and potentially leading to full system control.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the security update provided by Microsoft as soon as possible to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-22T21:30:09.119Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65774","vendor":"Microsoft"}]
Threat ID: 6a7b582ebf8831d5391563dc
Added to database: 08/11/2026, 17:13:18 UTC
Last enriched: 08/11/2026, 19:58:03 UTC
Last updated: 08/12/2026, 00:12:10 UTC
Views: 2
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