CVE-2026-5426

critical · 9.1

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

9.1

CVSS

1.0%

EPSS (exploit prob.)

62nd

EPSS percentile

2026-04-16

Published

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

Weaknesses

CWE-321CWE-502

References

https://cloud.google.com/blog/topics/threat-intelligence/knowledgedeliver-viewstate-deserialization-vulnerability
https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0009.md
https://www.digital-knowledge.co.jp/product/kd/

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-5426