CVE-2026-62739: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1809
Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the Windows HTTP.sys driver on Windows 10 Version 1809 (build 10.0.17763.0). An attacker with local authorized access can exploit this flaw to escalate privileges, potentially gaining higher system rights. The vulnerability is tracked as CWE-122 and has been assigned CVE-2026-62739. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate their privileges, potentially leading to full control over the affected system. The confidentiality, integrity, and availability of the system can be fully compromised.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1809 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62739 for detailed patching instructions.
CVE-2026-62739: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1809
Description
Heap-based buffer overflow in Windows HTTP.sys 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 HTTP.sys driver on Windows 10 Version 1809 (build 10.0.17763.0). An attacker with local authorized access can exploit this flaw to escalate privileges, potentially gaining higher system rights. The vulnerability is tracked as CWE-122 and has been assigned CVE-2026-62739. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate their privileges, potentially leading to full control over the affected system. The confidentiality, integrity, and availability of the system can be fully compromised.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1809 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62739 for detailed patching instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-14T21:01:21.823Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62739","vendor":"Microsoft"}]
Threat ID: 6a7b5811bf8831d539155b7e
Added to database: 08/11/2026, 17:12:49 UTC
Last enriched: 08/11/2026, 21:58:17 UTC
Last updated: 08/12/2026, 00:12:10 UTC
Views: 4
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