Is CVE-2026-54784 actively exploited?

No active exploitation of CVE-2026-54784 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54784 be exploited remotely?

Yes. CVE-2026-54784 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-54784?

CVE-2026-54784 has a CVSS score of 7.4 (HIGH).

HOME VULNERABILITIESCVE-2026-54784

HIGH

CVE-2026-54784

CWE-311Published: July 8, 2026· Updated: Jul 10, 2026

7.4

CVSS v3.1

EPSS:0.18%probability of exploitation in 30 daysPercentile:7.1th

Official Description

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. In version 1.9.0, CoreWCF SPNEGO SecurityContextToken negotiation can expose the proof key recovered from the RSTR when TransportWithMessageCredential with Windows client credentials and session establishment are used, allowing an observer to impersonate the authenticated Windows principal and decrypt or forge WS-SecureConversation traffic. This issue is fixed in version 1.9.1.

NVD Source

Technical Analysis

CVE-2026-54784 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 7.4.