CVE-2026-45640: CWE-416: Use After Free in Microsoft Windows 10 Version 21H2
Use after free in Windows Bluetooth Port Driver allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-45640) involves a use-after-free condition in the Windows Bluetooth Port Driver component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). The flaw enables an attacker with local access and limited privileges to elevate their privileges on the affected system. The vulnerability has been assigned a CVSS v3.1 base score of 7.0, indicating high severity, with attack vector local, high attack complexity, low privileges required, no user interaction, and impacts on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
An authorized local attacker could exploit this use-after-free vulnerability to elevate privileges, potentially gaining higher-level access on the affected Windows 10 Version 21H2 system. This could lead to full system compromise depending on the privileges gained. There are no known exploits in the wild at the time of this report.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is strongly recommended to apply the security update provided by Microsoft for Windows 10 Version 21H2 (build 10.0.19044.0) as soon as possible to remediate this issue.
CVE-2026-45640: CWE-416: Use After Free in Microsoft Windows 10 Version 21H2
Description
Use after free in Windows Bluetooth Port Driver allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.0high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45640) involves a use-after-free condition in the Windows Bluetooth Port Driver component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). The flaw enables an attacker with local access and limited privileges to elevate their privileges on the affected system. The vulnerability has been assigned a CVSS v3.1 base score of 7.0, indicating high severity, with attack vector local, high attack complexity, low privileges required, no user interaction, and impacts on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
An authorized local attacker could exploit this use-after-free vulnerability to elevate privileges, potentially gaining higher-level access on the affected Windows 10 Version 21H2 system. This could lead to full system compromise depending on the privileges gained. There are no known exploits in the wild at the time of this report.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is strongly recommended to apply the security update provided by Microsoft for Windows 10 Version 21H2 (build 10.0.19044.0) as soon as possible to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T20:33:35.156Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45640","vendor":"Microsoft"}]
Threat ID: 6a284ce78dd33fbd85664ecf
Added to database: 6/9/2026, 5:27:03 PM
Last enriched: 6/9/2026, 6:41:12 PM
Last updated: 6/10/2026, 5:06:41 AM
Views: 3
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