Is CVE-2026-54783 actively exploited?

No active exploitation of CVE-2026-54783 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54783 be exploited remotely?

Yes. CVE-2026-54783 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-54783?

CVE-2026-54783 has a CVSS score of 7.4 (HIGH).

HOME VULNERABILITIESCVE-2026-54783

HIGH

CVE-2026-54783

CWE-294Published: July 8, 2026· Updated: Jul 9, 2026

7.4

CVSS v3.1

EPSS:0.14%probability of exploitation in 30 daysPercentile:4.0th

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, CoreWCF WS-Security endorsing and supporting signature verification does not ensure the selected ds:Signature covers the expected Security header target, allowing an attacker with one captured signed SOAP envelope to replay arbitrary service operations as the victim principal. This issue is fixed in versions 1.8.1 and 1.9.1.

NVD Source

Technical Analysis

CVE-2026-54783 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.