{"id":"CVE-2025-4275","aliases":["EUVD-2025-18070","GHSA-v9r5-7mg9-fwrr"],"status":"published","title":"SecureFlashDxe: Incorrect UEFI variable attributes check allows usage of invalid certificate","description":"A vulnerability in the digital signature verification process does not properly validate variable attributes which allows an attacker to bypass signature verification by creating a non-authenticated NVRAM variable. An attacker may to execute arbitrary signed UEFI code and bypass Secure Boot.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00484,"percentile":0.42024,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2025-06-11T00:25:17Z","modified":"2026-06-17T09:32:55Z","exploits":[{"source":"pocgithub","id":"Dorlander/hydrophobia-scanner","title":"Dorlander/hydrophobia-scanner","date":"2026-10-22","url":"https://github.com/Dorlander/hydrophobia-scanner"},{"source":"pocgithub","id":"NikolajSchlej/Hydroph0bia","title":"NikolajSchlej/Hydroph0bia","date":"2025-06-10","url":"https://github.com/NikolajSchlej/Hydroph0bia"},{"source":"pocgithub","id":"TheMalwareGuardian/CVE-2025-4275","title":"TheMalwareGuardian/CVE-2025-4275","date":"2026-01-12","url":"https://github.com/TheMalwareGuardian/CVE-2025-4275"}],"products":[{"vendor":"insyde software","product":"insydeh2o"}],"references":[{"url":"https://www.insyde.com/security-pledge/sa-2025002/"},{"url":"https://www.kb.cert.org/vuls/id/211341"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-4275"},{"url":"https://www.insyde.com/security-pledge/sa-2025002"},{"url":"https://github.com/advisories/GHSA-v9r5-7mg9-fwrr"}],"sources":{"cve":[{"id":"CVE-2025-4275","title":"SecureFlashDxe: Incorrect UEFI variable attributes check allows usage of invalid certificate","description":"A vulnerability in the digital signature verification process does not properly validate variable attributes which allows an attacker to bypass signature verification by creating a non-authenticated NVRAM variable. An attacker may to execute arbitrary signed UEFI code and bypass Secure Boot.","status":"published","published":"2025-06-11T00:25:17.737Z","modified":"2025-08-14T05:58:07.245Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:32:48.167635Z"}],"euvd":[{"id":"EUVD-2025-18070","description":"A vulnerability in the digital signature verification process does not properly validate variable attributes which allows an attacker to bypass signature verification by creating a non-authenticated NVRAM variable. An attacker may to execute arbitrary signed UEFI code and bypass Secure Boot.","status":"published","published":"2025-06-11T00:25:17Z","modified":"2025-08-14T05:58:07Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:31:57.953552Z"}],"ghsa":[{"id":"GHSA-v9r5-7mg9-fwrr","title":"Running the provided utility changes the certificate on any Insyde BIOS and then the attached ...","description":"Running the provided utility changes the certificate on any Insyde BIOS and then the attached .efi file can be launched.","status":"published","published":"2025-06-11T03:31:07Z","modified":"2025-06-11T03:31:07Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:02:41.633611Z"}],"nvd":[{"id":"CVE-2025-4275","description":"A vulnerability in the digital signature verification process does not properly validate variable attributes which allows an attacker to bypass signature verification by creating a non-authenticated NVRAM variable. An attacker may to execute arbitrary signed UEFI code and bypass Secure Boot.","status":"published","published":"2025-06-11T01:15:20.75Z","modified":"2026-06-17T09:32:55.38Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"updated_at":"2026-11-02T14:11:11.789448Z"}]}}