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CVE-2026-5426

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0b588895b83bf373dedb7bbfbc1f27a16cb10bb63129ad3494b29eac263cfc47
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-502","description":"CWE-502 Deserialization of untrusted data","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8147187431f3a4632cf6fe096b2cff3bdcf32cd7ea7fbccd58bf22928d85f0c2 · sha256:23679f911246b596… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-321","description":"CWE-321 Use of hard-coded cryptographic key","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8147187431f3a4632cf6fe096b2cff3bdcf32cd7ea7fbccd58bf22928d85f0c2 · sha256:23679f911246b596… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"KnowledgeDeliver","vendor":"Digital Knowledge","versions":[{"lessThan":"20260224","status":"affected","version":"0","versionType":"date"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8147187431f3a4632cf6fe096b2cff3bdcf32cd7ea7fbccd58bf22928d85f0c2 · sha256:23679f911246b596… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8147187431f3a4632cf6fe096b2cff3bdcf32cd7ea7fbccd58bf22928d85f0c2 · sha256:23679f911246b596… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-502","description":"CWE-502 Deserialization of untrusted data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8147187431f3a4632cf6fe096b2cff3bdcf32cd7ea7fbccd58bf22928d85f0c2 · sha256:23679f911246b596… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-321","description":"CWE-321 Use of hard-coded cryptographic key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8147187431f3a4632cf6fe096b2cff3bdcf32cd7ea7fbccd58bf22928d85f0c2 · sha256:23679f911246b596… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["third-party-advisory"],"url":"https://cloud.google.com/blog/topics/threat-intelligence/knowledgedeliver-viewstate-deserialization-vulnerability"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8147187431f3a4632cf6fe096b2cff3bdcf32cd7ea7fbccd58bf22928d85f0c2 · sha256:23679f911246b596… · /containers/cna/references/2
{"tags":["third-party-advisory"],"url":"https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0009.md"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8147187431f3a4632cf6fe096b2cff3bdcf32cd7ea7fbccd58bf22928d85f0c2 · sha256:23679f911246b596… · /containers/cna/references/0
{"tags":["product"],"url":"https://www.digital-knowledge.co.jp/product/kd/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8147187431f3a4632cf6fe096b2cff3bdcf32cd7ea7fbccd58bf22928d85f0c2 · sha256:23679f911246b596… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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