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CVE-2026-5426— KnowledgeDeliver deployments before February 24, 2026 use a static ASP.NET/IIS machineKey value

Quick assessment

Affected
Digital Knowledge KnowledgeDeliver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Digital Knowledge KnowledgeDeliver是日本Digital Knowledge公司的一款在线学习管理系统。 Digital Knowledge KnowledgeDeliver 2026年2月24日之前版本存在安全漏洞，该漏洞源于硬编码ASP.NET/IIS machineKey值，可能导致远程代码执行。

AI Predicted 9.8 Difficulty: Easy EPSS 1.01% · P60

Affected Version Matrix 1

VendorProduct Version RangeStatus
Digital Knowledge KnowledgeDeliver < 20260224 affected
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I. Basic Information for CVE-2026-5426

Vulnerability Information
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Vulnerability Title
KnowledgeDeliver deployments before February 24, 2026 use a static ASP.NET/IIS machineKey value
Source: CVE Program / CVE List V5
Vulnerability Description
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
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的密码学密钥
Source: CVE Program / CVE List V5
Vulnerability Title
Digital Knowledge KnowledgeDeliver 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Digital Knowledge KnowledgeDeliver是日本Digital Knowledge公司的一款在线学习管理系统。 Digital Knowledge KnowledgeDeliver 2026年2月24日之前版本存在安全漏洞，该漏洞源于硬编码ASP.NET/IIS machineKey值，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Digital Knowledge KnowledgeDeliver 0 ~ 20260224 -

II. Public POCs for CVE-2026-5426

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-5426

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Vendor Advisories for CVE-2026-5426 (1)

Security Blog Posts for CVE-2026-5426 (1)

IV. Related Vulnerabilities

Same weakness: CWE-321

V. Comments for CVE-2026-5426

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