CVE-2026-34346: CWE-319: Cleartext Transmission of Sensitive Information in Microsoft Windows 10 Version 1607
Cleartext transmission of sensitive information in Windows Ancillary Function Driver for WinSock allows an authorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability involves the cleartext transmission of sensitive information within the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). An authorized attacker with local access can exploit this to disclose sensitive data. The CVSS 3.1 base score is 5.5, reflecting a medium severity with high confidentiality impact but no integrity or availability impact. Microsoft has released an official fix to address this issue.
Potential Impact
An authorized local attacker can disclose sensitive information due to cleartext transmission in the affected component. The confidentiality impact is high, but there is no impact on integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Windows 10 Version 1607 (build 10.0.14393.0) should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34346.
CVE-2026-34346: CWE-319: Cleartext Transmission of Sensitive Information in Microsoft Windows 10 Version 1607
Description
Cleartext transmission of sensitive information in Windows Ancillary Function Driver for WinSock allows an authorized attacker to disclose information locally.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves the cleartext transmission of sensitive information within the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). An authorized attacker with local access can exploit this to disclose sensitive data. The CVSS 3.1 base score is 5.5, reflecting a medium severity with high confidentiality impact but no integrity or availability impact. Microsoft has released an official fix to address this issue.
Potential Impact
An authorized local attacker can disclose sensitive information due to cleartext transmission in the affected component. The confidentiality impact is high, but there is no impact on integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Windows 10 Version 1607 (build 10.0.14393.0) should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34346.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-03-26T21:02:16.446Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34346","vendor":"Microsoft"}]
Threat ID: 6a566f6568715ace43e6b297
Added to database: 07/14/2026, 17:18:29 UTC
Last enriched: 08/13/2026, 14:13:25 UTC
Last updated: 08/27/2026, 11:04:02 UTC
Views: 54
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