CVE-2026-49800: CWE-190: Integer Overflow or Wraparound in Microsoft Windows 10 Version 1809
CVE-2026-49800 is an integer overflow or wraparound vulnerability in the Windows Web Proxy Auto-Discovery Protocol (WPAD) component of Microsoft Windows 10 Version 1809. This flaw allows an authorized local attacker to elevate privileges on the affected system. The vulnerability has a high severity rating with a CVSS score of 7.8. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability involves an integer overflow or wraparound in the WPAD feature of Windows 10 Version 1809 (build 10.0.17763.0). Exploitation requires local access with some privileges and does not require user interaction. Successful exploitation could lead to elevation of privileges, impacting confidentiality, integrity, and availability of the system. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this integer overflow vulnerability to elevate their privileges on the affected Windows 10 Version 1809 system. This could result in full system compromise, including unauthorized access to sensitive data and control over system processes.
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-2026-49800 to remediate this vulnerability.
CVE-2026-49800: CWE-190: Integer Overflow or Wraparound in Microsoft Windows 10 Version 1809
Description
CVE-2026-49800 is an integer overflow or wraparound vulnerability in the Windows Web Proxy Auto-Discovery Protocol (WPAD) component of Microsoft Windows 10 Version 1809. This flaw allows an authorized local attacker to elevate privileges on the affected system. The vulnerability has a high severity rating with a CVSS score of 7.8. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow or wraparound in the WPAD feature of Windows 10 Version 1809 (build 10.0.17763.0). Exploitation requires local access with some privileges and does not require user interaction. Successful exploitation could lead to elevation of privileges, impacting confidentiality, integrity, and availability of the system. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this integer overflow vulnerability to elevate their privileges on the affected Windows 10 Version 1809 system. This could result in full system compromise, including unauthorized access to sensitive data and control over system processes.
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-2026-49800 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-01T17:02:37.208Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49800","vendor":"Microsoft"}]
Threat ID: 6a566f6f68715ace43e6b599
Added to database: 07/14/2026, 17:18:39 UTC
Last enriched: 07/15/2026, 01:34:23 UTC
Last updated: 07/15/2026, 01:34:23 UTC
Views: 2
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