CVE-2026-54777

MediumCVSS 6.5/10Last modified Jul 10, 2026

Description

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, CoreWCF NetNamedPipe transport accepts attachment to a pre-existing named pipe instance, allowing local interception of NetNamedPipe traffic when an attacker races NamedPipeListener startup between shared memory GUID publication and service named pipe creation. This issue is fixed in versions 1.8.1 and 1.9.1.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

Weakness enumeration

CWE-367 CWE-665

Affected software

No affected versions have been published.

Timeline

Published: Jul 8, 2026
Last modified: Jul 10, 2026
NVD status: Deferred

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