CVE-2026-49801: CWE-908: Use of Uninitialized Resource in Microsoft Windows 10 Version 1607
Use of uninitialized resource in Windows SMB allows an authorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-49801) is classified as CWE-908 (Use of Uninitialized Resource) and affects Microsoft Windows 10 Version 1607 (build 10.0.14393.0). It occurs in the Windows SMB service, where an uninitialized resource can be exploited by an authorized local attacker to disclose information. 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 impact on confidentiality. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to disclose sensitive information from the affected Windows SMB component. There is no impact on integrity or availability. The confidentiality impact is high, but exploitation requires local access and low privileges.
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 indicated by the vendor.
CVE-2026-49801: CWE-908: Use of Uninitialized Resource in Microsoft Windows 10 Version 1607
Description
Use of uninitialized resource in Windows SMB 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 (CVE-2026-49801) is classified as CWE-908 (Use of Uninitialized Resource) and affects Microsoft Windows 10 Version 1607 (build 10.0.14393.0). It occurs in the Windows SMB service, where an uninitialized resource can be exploited by an authorized local attacker to disclose information. 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 impact on confidentiality. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to disclose sensitive information from the affected Windows SMB component. There is no impact on integrity or availability. The confidentiality impact is high, but exploitation requires local access and low privileges.
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 indicated by the vendor.
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: 08/13/2026, 14:25:58 UTC
Last updated: 08/28/2026, 22:52:11 UTC
Views: 86
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