CVE-2026-49175: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 21H2
CVE-2026-49175 is a heap-based buffer overflow vulnerability in the Windows DNS component of Microsoft Windows 10 Version 21H2. 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. Microsoft has released an official fix to address this issue.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the Windows DNS implementation on Windows 10 Version 21H2 (build 10.0.19044.0). An attacker with local authorized access can exploit this flaw to elevate their privileges, potentially gaining higher-level permissions. The vulnerability is tracked as CWE-122. Microsoft has published an official security update 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 in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49175 to remediate this vulnerability.
CVE-2026-49175: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 21H2
Description
CVE-2026-49175 is a heap-based buffer overflow vulnerability in the Windows DNS component of Microsoft Windows 10 Version 21H2. 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. Microsoft has released an official fix 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 a heap-based buffer overflow in the Windows DNS implementation on Windows 10 Version 21H2 (build 10.0.19044.0). An attacker with local authorized access can exploit this flaw to elevate their privileges, potentially gaining higher-level permissions. The vulnerability is tracked as CWE-122. Microsoft has published an official security update 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 in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49175 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-27T23:44:09.623Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49175","vendor":"Microsoft"}]
Threat ID: 6a566f6b68715ace43e6b3db
Added to database: 07/14/2026, 17:18:35 UTC
Last enriched: 07/15/2026, 01:48:53 UTC
Last updated: 07/15/2026, 01:48:53 UTC
Views: 2
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