CVE-2026-50690

Analyzed Analyzed - Analysis Complete

Use of Uninitialized Resource in Windows SMB Allows Local Information Disclosure

Publication date: 2026-07-14

Last updated on: 2026-07-22

Assigner: Microsoft Corporation

Description

Use of uninitialized resource in Windows SMB allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-14

Last Modified

2026-07-22

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-50690

EUVD

EUVD-2026-44147

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_11_26h1	to 10.0.28000.2269 (exc)
microsoft	windows_10_1607	to 10.0.14393.9339 (exc)
microsoft	windows_10_1607	to 10.0.14393.9339 (exc)
microsoft	windows_10_1809	to 10.0.17763.9020 (exc)
microsoft	windows_10_1809	to 10.0.17763.9020 (exc)
microsoft	windows_server_2016	to 10.0.14393.9339 (exc)
microsoft	windows_server_2019	to 10.0.17763.9020 (exc)
microsoft	windows_server_2022	to 10.0.20348.5386 (exc)
microsoft	windows_server_2025	to 10.0.26100.33158 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2525 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8875 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8875 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-908	The product uses or accesses a resource that has not been initialized.

Attack-Flow Graph

Executive Summary

This vulnerability involves the use of an uninitialized resource in Windows SMB (Server Message Block). An authorized attacker can exploit this to disclose information locally on the affected system.

Detection Guidance

This vulnerability involves uninitialized resources in Windows SMB, which may allow local information disclosure. Detection typically requires examining system logs for unusual SMB activity or errors related to uninitialized resources. Microsoft recommends applying security updates to mitigate this issue.

Impact Analysis

An attacker with local access could exploit this to read sensitive information from memory, potentially exposing confidential data stored or processed on the system.

Compliance Impact

This vulnerability could lead to unauthorized information disclosure, which may violate data protection requirements under GDPR or HIPAA if sensitive personal or health data is exposed.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows SMB vulnerability. Monitor Microsoft's update guide for patches and install them promptly.

Hi! I’m here to help you understand CVE-2026-50690. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70