CVE-2026-49801: CWE-908: Use of Uninitialized Resource in Microsoft Windows 10 Version 1607
CVE-2026-49801 is a medium severity vulnerability in Microsoft Windows 10 Version 1607 involving the use of an uninitialized resource in the SMB component. This flaw allows an authorized local attacker to disclose sensitive information. The vulnerability has been officially fixed by Microsoft.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-49801) is classified as CWE-908 (Use of Uninitialized Resource) and affects Windows 10 Version 1607 (build 10.0.14393.0). It occurs in the SMB protocol implementation, where an uninitialized resource can lead to information disclosure by an authorized local attacker. The CVSS v3.1 base score is 5.5 (medium severity), with attack vector local, low attack complexity, low privileges required, no user interaction, and high confidentiality impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to disclose sensitive information due to the use of an uninitialized resource in the SMB service. There is no impact on integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the security update provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49801. No additional mitigation actions are required beyond applying the official patch.
CVE-2026-49801: CWE-908: Use of Uninitialized Resource in Microsoft Windows 10 Version 1607
Description
CVE-2026-49801 is a medium severity vulnerability in Microsoft Windows 10 Version 1607 involving the use of an uninitialized resource in the SMB component. This flaw allows an authorized local attacker to disclose sensitive information. The vulnerability has been officially fixed by Microsoft.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-49801) is classified as CWE-908 (Use of Uninitialized Resource) and affects Windows 10 Version 1607 (build 10.0.14393.0). It occurs in the SMB protocol implementation, where an uninitialized resource can lead to information disclosure by an authorized local attacker. The CVSS v3.1 base score is 5.5 (medium severity), with attack vector local, low attack complexity, low privileges required, no user interaction, and high confidentiality impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to disclose sensitive information due to the use of an uninitialized resource in the SMB service. There is no impact on integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the security update provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49801. No additional mitigation actions are required beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-01T17:02:37.208Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49801","vendor":"Microsoft"}]
Threat ID: 6a566f6f68715ace43e6b59c
Added to database: 07/14/2026, 17:18:39 UTC
Last enriched: 07/15/2026, 01:34:17 UTC
Last updated: 07/15/2026, 03:06:41 UTC
Views: 6
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