{"id":"CVE-2026-5426","aliases":["EUVD-2026-23271","GHSA-g88c-8gfj-6c98"],"status":"published","title":"KnowledgeDeliver deployments before February 24, 2026 use a static ASP.NET/IIS machineKey value","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","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.01008,"percentile":0.6334,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-321","CWE-502"],"published":"2026-04-16T15:18:46Z","modified":"2026-10-26T21:10:00Z","exploits":[{"source":"pocgithub","id":"HORKimhab/CVE-2026-5426","title":"HORKimhab/CVE-2026-5426","date":"2026-05-26","url":"https://github.com/HORKimhab/CVE-2026-5426"}],"products":[{"vendor":"digital knowledge","product":"knowledgedeliver"}],"references":[{"url":"https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0009.md","tags":["third-party-advisory"]},{"url":"https://www.digital-knowledge.co.jp/product/kd/","tags":["product"]},{"url":"https://cloud.google.com/blog/topics/threat-intelligence/knowledgedeliver-viewstate-deserialization-vulnerability","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5426"},{"url":"https://www.digital-knowledge.co.jp/product/kd"},{"url":"https://github.com/advisories/GHSA-g88c-8gfj-6c98"}],"sources":{"cve":[{"id":"CVE-2026-5426","title":"KnowledgeDeliver deployments before February 24, 2026 use a static ASP.NET/IIS machineKey value","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","status":"published","published":"2026-04-16T15:18:46.224Z","modified":"2026-05-27T14:53:16.313Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp"}],"cwes":["CWE-321","CWE-502"],"updated_at":"2026-11-02T13:39:27.849196Z"}],"euvd":[{"id":"EUVD-2026-23271","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","status":"published","published":"2026-04-16T15:18:46Z","modified":"2026-05-27T14:53:16Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T18:21:04.415835Z"}],"ghsa":[{"id":"GHSA-g88c-8gfj-6c98","title":"Hard-coded ASP.NET/IIS machineKey value in Digital Knowledge KnowledgeDeliver deployments prior...","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","status":"published","published":"2026-04-16T18:31:22Z","modified":"2026-05-26T21:32:41Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-321"],"updated_at":"2026-11-02T15:08:18.762226Z"}],"nvd":[{"id":"CVE-2026-5426","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","status":"published","published":"2026-04-16T16:16:17.693Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-321","CWE-502"],"updated_at":"2026-11-02T14:12:15.120927Z"}]}}