{"id":"CVE-2025-4276","aliases":["EUVD-2025-24533","GHSA-rx4h-pwfx-x49f"],"status":"published","title":"UsbCoreDxe: improper input validation may lead to arbitrary code execution","description":"UsbCoreDxe has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00152,"percentile":0.04406,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2025-08-13T01:41:56Z","modified":"2026-06-17T09:32:55Z","products":[{"vendor":"insyde software","product":"insydeh2o"}],"references":[{"url":"https://www.insyde.com/security-pledge/sa-2025005/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-4276"},{"url":"https://www.insyde.com/security-pledge/sa-2025005"},{"url":"https://github.com/advisories/GHSA-rx4h-pwfx-x49f"}],"sources":{"cve":[{"id":"CVE-2025-4276","title":"UsbCoreDxe: improper input validation may lead to arbitrary code execution","description":"UsbCoreDxe has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.","status":"published","published":"2025-08-13T01:41:56.834Z","modified":"2025-08-14T05:54:07.744Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:32:48.512547Z"}],"euvd":[{"id":"EUVD-2025-24533","description":"UsbCoreDxe has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.","status":"published","published":"2025-08-13T01:41:56Z","modified":"2025-08-14T05:54:07Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:31:57.953552Z"}],"ghsa":[{"id":"GHSA-rx4h-pwfx-x49f","title":"UsbCoreDxe has a vulnerability which can be used to write arbitrary memory inside SMRAM and...","description":"UsbCoreDxe has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.","status":"published","published":"2025-08-13T03:30:24Z","modified":"2025-08-13T03:30:35Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:03:16.090631Z"}],"nvd":[{"id":"CVE-2025-4276","description":"UsbCoreDxe has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.","status":"published","published":"2025-08-13T02:15:25.723Z","modified":"2026-06-17T09:32:55.49Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:11:22.953396Z"}]}}