EUVD-2026-44047
GHSA-93qq-4vh3-3vm5
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local low-privilege user triggers uninitialized read in upnp.dll; high confidentiality impact from memory disclosure, no integrity or availability impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
Use of uninitialized resource in Universal Plug and Play (upnp.dll) allows an authorized attacker to disclose information locally.
AnalysisAI
Local information disclosure in Windows Universal Plug and Play (upnp.dll) exposes sensitive memory contents to authorized low-privilege users across a wide range of Windows 10, Windows 11, and Windows Server releases. The flaw stems from use of an uninitialized resource (CWE-908), meaning the UPnP service reads from memory that has not been properly initialized before use, potentially leaking stale heap or stack contents. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid local user account with at least standard (low-privilege) access to the target Windows system, as indicated by PR:L in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 5.5 (Medium) reflects the local attack vector (AV:L) and low-privilege requirement (PR:L), which substantially limits the exploitable population compared to a network-reachable flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A standard Windows user account logs in locally or via Remote Desktop to an affected Windows system, then executes crafted code that invokes UPnP APIs exposed through upnp.dll. The call triggers the uninitialized memory read path, and the attacker reads the returned buffer containing stale memory - potentially exposing credentials, session tokens, or encryption keys previously resident in that memory region. |
| Remediation | Apply the vendor-released patch via Windows Update or the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50455. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-908 – Use of Uninitialized Resource
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External POC / Exploit Code
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