Is CVE-2026-54774 actively exploited?

No active exploitation of CVE-2026-54774 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54774 be exploited remotely?

Yes. CVE-2026-54774 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-54774?

CVE-2026-54774 has a CVSS score of 7.4 (HIGH).

HOME VULNERABILITIESCVE-2026-54774

HIGH

CVE-2026-54774

CWE-345Published: July 8, 2026· Updated: Jul 10, 2026

7.4

CVSS v3.1

EPSS:0.15%probability of exploitation in 30 daysPercentile:4.6th

Official 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, SamlSerializer skips final SignatureValue verification when a CoreWCF service validates SAML tokens using a non-X.509 signing token, allowing an attacker to reference a non-X.509 SecurityToken key identifier and bypass assertion signature verification. This issue is fixed in versions 1.8.1 and 1.9.1.

NVD Source

Technical Analysis

CVE-2026-54774 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.