Remote Code Execution Vulnerability in Digital Knowledge's KnowledgeDeliver Software
CVE-2026-5426

7.5HIGH

Key Information:

Vendor

Digital Knowledge

Status
Knowledgedeliver
Vendor
CVE Published:
16 April 2026

Badges

💰 Ransomware👾 Exploit Exists🟡 Public PoC📰 News Worthy

What is CVE-2026-5426?

A hard-coded machineKey value in Digital Knowledge's KnowledgeDeliver software, prior to February 24, 2026, enables attackers to bypass ViewState validation. This vulnerability can be exploited through malicious ViewState deserialization attacks, allowing unauthorized remote code execution. Proper handling and configuration of machineKey values are critical to mitigate this risk.

Affected Version(s)

KnowledgeDeliver 0 < 20260224

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-5426
Created by HORKimhab

News Articles

favicon imageThe Hacker News

KnowledgeDeliver LMS Flaw Exploited to Deploy Godzilla and Cobalt Strike

CVE-2026-5426 enabled KnowledgeDeliver LMS attacks before February 24, 2026, leading to Cobalt Strike infections.

13 hours ago

References

https://github.com/mandiant/Vulnerability-Disclosures/blo...
third-party-advisory
https://www.digital-knowledge.co.jp/product/kd/
product

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 💰

    Used in Ransomware

  • 👾

    Exploit known to exist

  • 📰

    First article discovered by The Hacker News

  • Vulnerability published

  • Vulnerability Reserved

.