{"id":"CVE-2026-8863","state":"PUBLISHED","title":"CVE-2026-8863","description":"Multiple Microsoft-sigend UEFI SHIM bootloaders are vulnerable to SecureBoot bypass. An attacker with administrative privileges or the ability to modify the boot process could use one of the vulnerable shim bootloaders to bypass Secure Boot protections and execute arbitrary code before the operating system loads. Specific UEFI DBX update is required to block these vulnerable boot loaders.","publishedAt":"2026-06-09T18:10:15.426Z","updatedAt":"2026-06-10T15:16:35.228Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"certcc","products":["Oracle Corporation OracleLinux(7.2) shim","PC-Doctor Service Center Enterprise","PC-Doctor Service Center Drive Erase","PC-Doctor Service Center Japan","PC-Doctor Service Center","PC-Doctor Network Factory for Linux (Bootable Diagnostics)","PC-Doctor Factory for Linux (Bootable Diagnostics)","Spyrus WTGCreator","Blancco UK WhiteCanyon WipeDrive","baramundi software baramundi Management Suite","SUSE Linux OpenSUSE shim","Finland Matriculation Board Abitti 1","NTC IT ROSA LLC RosaLinux"],"affected":[{"vendor":"Oracle Corporation","product":"OracleLinux(7.2) shim","versions":[{"version":"0.9","status":"affected"}]},{"vendor":"PC-Doctor","product":"Service Center Enterprise","versions":[{"version":"14","status":"affected","lessThanOrEqual":"17.0.7536.900","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Service Center Drive Erase","versions":[{"version":"15","status":"affected","lessThanOrEqual":"17.0.7538.592","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Service Center Japan","versions":[{"version":"15","status":"affected","lessThanOrEqual":"17.0.7539.904","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Service Center","versions":[{"version":"14","status":"affected","lessThanOrEqual":"17.0.7535.900","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Network Factory for Linux (Bootable Diagnostics)","versions":[{"version":"6.9","status":"affected","lessThanOrEqual":"6.20.7711.267","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Factory for Linux (Bootable Diagnostics)","versions":[{"version":"6.9","status":"affected","lessThanOrEqual":"6.20.7710.267","versionType":"custom"}]},{"vendor":"Spyrus","product":"WTGCreator","versions":[{"version":"4.2","status":"affected"}]},{"vendor":"Blancco UK","product":"WhiteCanyon WipeDrive","versions":[{"version":"8.0.0","status":"affected","lessThanOrEqual":"8.1.3","versionType":"custom"}]},{"vendor":"baramundi software","product":"baramundi Management Suite","versions":[{"version":"*","status":"affected","lessThanOrEqual":"2024R1","versionType":"custom"}]},{"vendor":"SUSE Linux","product":"OpenSUSE shim","versions":[{"version":"0.9","status":"affected"}]},{"vendor":"Finland Matriculation Board","product":"Abitti 1","versions":[{"version":"1.0.0","status":"affected"}]},{"vendor":"NTC IT ROSA LLC","product":"RosaLinux","versions":[{"version":"R9","status":"affected"}]},{"vendor":"NTC IT ROSA LLC","product":"RosaLinux","versions":[{"version":"R10","status":"affected"}]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-8863","https://kb.cert.org/vuls/id/616257","https://www.kb.cert.org/vuls/id/616257"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/8xxx/CVE-2026-8863.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8863","state":"PUBLISHED","datePublished":"2026-06-09T18:10:15.426Z","dateUpdated":"2026-06-10T15:16:35.228Z","assignerShortName":"certcc","assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateReserved":"2026-05-18T19:41:10.790Z"},"containers":{"cna":{"title":"CVE-2026-8863","descriptions":[{"lang":"en","value":"Multiple Microsoft-sigend UEFI SHIM bootloaders are vulnerable to SecureBoot bypass. An attacker with administrative privileges or the ability to modify the boot process could use one of the vulnerable shim bootloaders to bypass Secure Boot protections and execute arbitrary code before the operating system loads. Specific UEFI DBX update is required to block these vulnerable boot loaders."}],"affected":[{"vendor":"Oracle Corporation","product":"OracleLinux(7.2) shim","versions":[{"version":"0.9","status":"affected"}]},{"vendor":"PC-Doctor","product":"Service Center Enterprise","versions":[{"version":"14","status":"affected","lessThanOrEqual":"17.0.7536.900","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Service Center Drive Erase","versions":[{"version":"15","status":"affected","lessThanOrEqual":"17.0.7538.592","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Service Center Japan","versions":[{"version":"15","status":"affected","lessThanOrEqual":"17.0.7539.904","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Service Center","versions":[{"version":"14","status":"affected","lessThanOrEqual":"17.0.7535.900","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Network Factory for Linux (Bootable Diagnostics)","versions":[{"version":"6.9","status":"affected","lessThanOrEqual":"6.20.7711.267","versionType":"custom"}]},{"vendor":"PC-Doctor","product":"Factory for Linux (Bootable Diagnostics)","versions":[{"version":"6.9","status":"affected","lessThanOrEqual":"6.20.7710.267","versionType":"custom"}]},{"vendor":"Spyrus","product":"WTGCreator","versions":[{"version":"4.2","status":"affected"}]},{"vendor":"Blancco UK","product":"WhiteCanyon WipeDrive","versions":[{"version":"8.0.0","status":"affected","lessThanOrEqual":"8.1.3","versionType":"custom"}]},{"vendor":"baramundi software","product":"baramundi Management Suite","versions":[{"version":"*","status":"affected","lessThanOrEqual":"2024R1","versionType":"custom"}]},{"vendor":"SUSE Linux","product":"OpenSUSE shim","versions":[{"version":"0.9","status":"affected"}]},{"vendor":"Finland Matriculation Board","product":"Abitti 1","versions":[{"version":"1.0.0","status":"affected"}]},{"vendor":"NTC IT ROSA LLC","product":"RosaLinux","versions":[{"version":"R9","status":"affected"}]},{"vendor":"NTC IT ROSA LLC","product":"RosaLinux","versions":[{"version":"R10","status":"affected"}]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-8863","name":"Microsoft Vendor Security Advisory","tags":["vendor-advisory"]},{"url":"https://kb.cert.org/vuls/id/616257","name":"CERT/CC Vulnerability Notice","tags":["third-party-advisory"]}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-347: Improper Verification of Cryptographic Signature"}]},{"descriptions":[{"lang":"en","description":"CWE-354: Improper Validation of Integrity Check Value"}]}],"providerMetadata":{"shortName":"certcc","orgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateUpdated":"2026-06-10T15:16:35.228Z"},"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"VINCE 3.0.42","env":"prod","origin":"https://cveawg.mitre.org/api/cve/CVE-2026-8863"},"credits":[{"lang":"en","value":"Thanks to Martin Smolar of ESET for discovering and reporting this vulnerability","type":"finder"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-09T19:03:03.811729Z","id":"CVE-2026-8863","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-09T19:03:21.716Z"}},{"title":"CVE Program Container","references":[{"url":"https://www.kb.cert.org/vuls/id/616257"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-06-09T19:41:27.054Z"}}]}}}