CVE-2026-50455

Analyzed Analyzed - Analysis Complete

Use of Uninitialized Resource in UPnP (upnp.dll) Allows Local Information Disclosure

Publication date: 2026-07-14

Last updated on: 2026-07-22

Assigner: Microsoft Corporation

Description

Use of uninitialized resource in Universal Plug and Play (upnp.dll) 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-2026-50455

EUVD

EUVD-2026-44047

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_11_24h2	to 10.0.26100.8875 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8875 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8875 (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 the Universal Plug and Play (UPnP) component (upnp.dll). An authorized attacker can exploit this to disclose information locally on the affected system.

Detection Guidance

Detection of this vulnerability requires checking for uninitialized resource usage in upnp.dll. Monitor system logs for unusual information disclosure events and inspect upnp.dll for uninitialized memory access patterns. Use tools like Process Monitor to track upnp.dll behavior and ensure it is not accessing uninitialized resources.

Impact Analysis

An attacker with local access could exploit this flaw to read sensitive information from the system, potentially leading to data leaks or further attacks.

Compliance Impact

This vulnerability could lead to unauthorized information disclosure, which may violate compliance requirements such as GDPR or HIPAA if sensitive data is exposed.

Mitigation Strategies

Apply the latest security updates from Microsoft for Universal Plug and Play (upnp.dll) to address the uninitialized resource issue. Monitor Microsoft's update guide for patches and ensure your systems are updated promptly.

Hi! I’m here to help you understand CVE-2026-50455. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70