{"id":"CVE-2026-19398","aliases":["EUVD-2026-66834","GHSA-mqcp-4543-826g"],"status":"published","title":"“unsupported-when-assigned.” An out-of-bounds write in the SmiFlash SMM module of ASUS FA507NU...","description":"An out-of-bounds write in the SmiFlash SMM module of ASUS FA507NU and FA507NV BIOS allows a local  administrator to cause a system crash (BSOD) or BIOS corruption via a crafted software SMI (SW SMI) request with an oversized length value.Refer to the ' \nSecurity Update for ASUS FA507NV / FA507NU BIOS   ' section on the ASUS Security Advisory for more information.","severity":{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0016,"percentile":0.05231,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2026-08-27T02:00:16Z","modified":"2026-09-09T04:17:56Z","products":[{"vendor":"asus","product":"fa507nu"},{"vendor":"asus","product":"fa507nv"}],"references":[{"url":"https://www.asus.com/security-advisory"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19398"},{"url":"https://github.com/advisories/GHSA-mqcp-4543-826g"}],"sources":{"cve":[{"id":"CVE-2026-19398","description":"An out-of-bounds write in the SmiFlash SMM module of ASUS FA507NU and FA507NV BIOS allows a local  administrator to cause a system crash (BSOD) or BIOS corruption via a crafted software SMI (SW SMI) request with an oversized length value.Refer to the ' \nSecurity Update for ASUS FA507NV / FA507NU BIOS   ' section on the ASUS Security Advisory for more information.","status":"published","published":"2026-08-27T02:00:16.449Z","modified":"2026-09-09T03:29:59.653Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T13:47:17.512524Z"}],"euvd":[{"id":"EUVD-2026-66834","description":"An out-of-bounds write in the SmiFlash SMM module of ASUS FA507NU and FA507NV BIOS allows a local  administrator to cause a system crash (BSOD) or BIOS corruption via a crafted software SMI (SW SMI) request with an oversized length value.Refer to the ' \nSecurity Update for ASUS FA507NV / FA507NU BIOS   ' section on the ASUS Security Advisory for more information.","status":"published","published":"2026-08-27T02:00:16Z","modified":"2026-09-09T03:29:59Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:28:28.121378Z"}],"ghsa":[{"id":"GHSA-mqcp-4543-826g","title":"“unsupported-when-assigned.” An out-of-bounds write in the SmiFlash SMM module of ASUS FA507NU...","description":"“unsupported-when-assigned.” An out-of-bounds write in the SmiFlash SMM module of ASUS FA507NU and FA507NV BIOS allows a local  administrator to cause a system crash (BSOD) or BIOS corruption via a crafted software SMI (SW SMI) request with an oversized length value.Refer to the ' \nSecurity Update for ASUS FA507NV / FA507NU BIOS   ' section on the ASUS Security Advisory for more information.","status":"published","published":"2026-08-27T03:32:58Z","modified":"2026-08-27T03:33:01Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:11:02.000078Z"}],"nvd":[{"id":"CVE-2026-19398","description":"An out-of-bounds write in the SmiFlash SMM module of ASUS FA507NU and FA507NV BIOS allows a local  administrator to cause a system crash (BSOD) or BIOS corruption via a crafted software SMI (SW SMI) request with an oversized length value.Refer to the ' \nSecurity Update for ASUS FA507NV / FA507NU BIOS   ' section on the ASUS Security Advisory for more information.","status":"published","published":"2026-08-27T02:16:27.46Z","modified":"2026-09-09T04:17:56.747Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:12:42.035353Z"}]}}