CVE-2026-5426

Hard-coded ASP.NET/IIS machineKey value in Digital Knowledge KnowledgeDeliver deployments prior to February 24, 2026 allows adversaries to circumvent ViewState validation mechanisms and achieve remote code execution via malicious ViewState deserialization attacks

Affected products

Knowledgedeliver

CVSS 3.1

9.1 CRITICAL

EPSS

1.0% (60th percentile)

Weakness

CWE-321, CWE-502

NVD status

Awaiting Analysis

Published

2026-04-16

Attack patterns

CAPEC-586