CVE-2026-50399: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 21H2
Out-of-bounds read in Windows Kernel allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
CVE-2026-50399 is a local privilege escalation vulnerability caused by an out-of-bounds read in the Windows Kernel on Windows 10 Version 21H2 (build 10.0.19044.0). An authorized attacker with local access can exploit this flaw to gain elevated privileges. The vulnerability is tracked as CWE-125 (Out-of-bounds Read). Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate their privileges, potentially gaining higher system rights. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
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-2026-50399 to remediate this vulnerability.
CVE-2026-50399: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 21H2
Description
Out-of-bounds read in Windows Kernel 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
CVE-2026-50399 is a local privilege escalation vulnerability caused by an out-of-bounds read in the Windows Kernel on Windows 10 Version 21H2 (build 10.0.19044.0). An authorized attacker with local access can exploit this flaw to gain elevated privileges. The vulnerability is tracked as CWE-125 (Out-of-bounds Read). Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate their privileges, potentially gaining higher system rights. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
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-2026-50399 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-04T18:56:53.258Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50399","vendor":"Microsoft"}]
Threat ID: 6a56769868715ace43f08e71
Added to database: 07/14/2026, 17:49:12 UTC
Last enriched: 07/15/2026, 00:03:17 UTC
Last updated: 07/15/2026, 04:18:39 UTC
Views: 4
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