Skip to main content

Mondoo

Vulnerability Management
Technology
Services

Solutions

Financial Services
Manufacturing
Healthcare

Resources

Blog
Vulnerability Database
Documentation
GitHub

Company

About
Careers
Partners
Contact

Legal

Privacy
Terms
Imprint

© 2026 Mondoo, Inc.

Log in Get Assessment

Vulnerability IntelligenceCVE-2026-5426

CVE-2026-5426

HIGH7.5

KnowledgeDeliver deployments before February 24, 2026 use a static ASP.NET/IIS machineKey value

Published Apr 16, 2026

Modified 6 days ago

Details

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

References

https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0009.md

https://www.cve.org/CVERecord?id=CVE-2026-5426

https://www.digital-knowledge.co.jp/product/kd/

CVSS Analysis

CVSS v3.1

7.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

NoneI:N

Availability

NoneA:N

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

Weakness Type (CWE)

Other

Serialization

Deserialization of Untrusted Data

Ecosystems

Timeline

PublishedApr 16, 2026

ModifiedApr 18, 2026

CVE-2026-5426 | Mondoo Vulnerability Intelligence