{"id":"CVE-2026-18448","aliases":["EUVD-2026-122789"],"status":"published","title":"Leak SMM RAM from the kernel (Simply TSA after an SMI)","description":"EDK2 contains a vulnerability in BIOS\nwhere a privileged attacker may cause “Exposure of Sensitive Information during\nTransient Execution” by local access. Successful exploitation of\nthis vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality.","severity":{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00131,"percentile":0.02754,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1420"],"published":"2026-11-10T18:39:53Z","modified":"2026-11-10T18:39:53Z","products":[{"vendor":"tianocore","product":"edk2"}],"references":[{"url":"https://github.com/tianocore/edk2/security/advisories/GHSA-7v86-66vf-h88j"}],"sources":{"cve":[{"id":"CVE-2026-18448","title":"Leak SMM RAM from the kernel (Simply TSA after an SMI)","description":"EDK2 contains a vulnerability in BIOS\nwhere a privileged attacker may cause “Exposure of Sensitive Information during\nTransient Execution” by local access. Successful exploitation of\nthis vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality.","status":"published","published":"2026-11-10T18:39:53.329Z","modified":"2026-11-10T18:39:53.329Z","cvss":[{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-1420"],"updated_at":"2026-11-10T19:39:59.389041Z"}],"euvd":[{"id":"EUVD-2026-122789","description":"EDK2 contains a vulnerability in BIOS\nwhere a privileged attacker may cause “Exposure of Sensitive Information during\nTransient Execution” by local access. Successful exploitation of\nthis vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality.","status":"published","published":"2026-11-10T18:39:53Z","modified":"2026-11-10T18:39:53Z","cvss":[{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-10T20:23:07.469802Z"}],"nvd":[{"id":"CVE-2026-18448","description":"EDK2 contains a vulnerability in BIOS\nwhere a privileged attacker may cause “Exposure of Sensitive Information during\nTransient Execution” by local access. Successful exploitation of\nthis vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality.","status":"published","published":"2026-11-10T19:21:15.707Z","modified":"2026-11-10T19:21:15.707Z","cvss":[{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/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"}],"updated_at":"2026-11-10T22:21:33.392456Z"}]}}