CVE-2026-68849: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 21H2
Description
CVE-2026-68849 is an out-of-bounds read vulnerability in the Windows Bluetooth Port Driver affecting Windows 10 Version 21H2 and other specified builds. This flaw allows an authorized local attacker to disclose information. The vulnerability has a medium severity rating with a CVSS score of 4.7. An official fix is available from Microsoft.
CVSS v3.1
Score 4.7medium
Affected software
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read in the Windows Bluetooth Port Driver component of Microsoft Windows 10 Version 21H2 and related builds. It permits an authorized attacker with local access to read memory outside the intended bounds, potentially leading to information disclosure. The issue is tracked as CWE-125. Microsoft has published an official fix addressing this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to disclose sensitive information from memory due to an out-of-bounds read condition. There is no indication of privilege escalation, denial of service, or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
An official fix from Microsoft is available and should be applied to affected systems. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68849 for update details and installation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-31T16:47:02.144Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68849","vendor":"Microsoft"}]
Threat ID: 6aa044d6acd9273b49fa7c8b
Added to database: 09/08/2026, 17:24:38 UTC
Last enriched: 10/16/2026, 20:55:40 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 24
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