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
Published: 2026-04-16
Score: 9.1 Critical
EPSS: 1.0% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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History

Tue, 26 May 2026 19:00:00 +0000


Tue, 26 May 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sat, 18 Apr 2026 03:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 16 Apr 2026 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Digital Knowledge
Digital Knowledge knowledgedeliver
Vendors & Products Digital Knowledge
Digital Knowledge knowledgedeliver

Thu, 16 Apr 2026 16:00:00 +0000

Type Values Removed Values Added
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
Title KnowledgeDeliver deployments before February 24, 2026 use a static ASP.NET/IIS machineKey value
Weaknesses CWE-321
CWE-502
References

Subscriptions

Digital Knowledge Knowledgedeliver
cve-icon MITRE

Status: PUBLISHED

Assigner: Mandiant

Published:

Updated: 2026-05-27T14:53:16.313Z

Reserved: 2026-04-02T14:20:13.588Z

Link: CVE-2026-5426

cve-icon Vulnrichment

Updated: 2026-04-18T02:31:27.581Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-16T16:16:17.693

Modified: 2026-06-17T10:59:00.653

Link: CVE-2026-5426

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-26T19:00:15Z

Weaknesses