{"id":"CVE-2025-62864","aliases":["EUVD-2025-203817","GHSA-66wq-fq77-7cfq"],"status":"published","title":"Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and...","description":"Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM MMCommunicate service that could result in an out-of-bounds write within the UEFI-MM Secure Partition context.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00365,"percentile":0.30612,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2025-12-16T00:00:00Z","modified":"2026-10-13T11:10:00Z","products":[{"vendor":"amperecomputing","product":"ampereone_a128-34x_firmware"},{"vendor":"amperecomputing","product":"ampereone_a144-24x_firmware"},{"vendor":"amperecomputing","product":"ampereone_a144-26m_firmware"},{"vendor":"amperecomputing","product":"ampereone_a144-27x_firmware"},{"vendor":"amperecomputing","product":"ampereone_a144-33m_firmware"},{"vendor":"amperecomputing","product":"ampereone_a160-28m_firmware"},{"vendor":"amperecomputing","product":"ampereone_a160-28x_firmware"},{"vendor":"amperecomputing","product":"ampereone_a192-26m_firmware"},{"vendor":"amperecomputing","product":"ampereone_a192-26x_firmware"},{"vendor":"amperecomputing","product":"ampereone_a192-32m_firmware"},{"vendor":"amperecomputing","product":"ampereone_a192-32x_firmware"},{"vendor":"amperecomputing","product":"ampereone_a96-36m_firmware"},{"vendor":"amperecomputing","product":"ampereone_a96-36x_firmware"}],"references":[{"url":"https://amperecomputing.com/products/product-security","tags":["Vendor Advisory"]},{"url":"https://amperecomputing.com/products/security-bulletins/amp-sb-0007","tags":["Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62864"},{"url":"https://github.com/advisories/GHSA-66wq-fq77-7cfq"}],"sources":{"cve":[{"id":"CVE-2025-62864","description":"Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM MMCommunicate service that could result in an out-of-bounds write within the UEFI-MM Secure Partition context.","status":"published","published":"2025-12-16T00:00:00Z","modified":"2025-12-17T14:31:33.278Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:32:54.534202Z"}],"euvd":[{"id":"EUVD-2025-203817","description":"Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM MMCommunicate service that could result in an out-of-bounds write within the UEFI-MM Secure Partition context.","status":"published","published":"2025-12-16T00:00:00Z","modified":"2025-12-17T14:31:33Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T19:49:04.015486Z"}],"ghsa":[{"id":"GHSA-66wq-fq77-7cfq","title":"Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and...","description":"Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM MMCommunicate service that could result in an out-of-bounds write within the UEFI-MM Secure Partition context.","status":"published","published":"2025-12-16T18:31:35Z","modified":"2025-12-17T15:35:56Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:05:14.584234Z"}],"nvd":[{"id":"CVE-2025-62864","description":"Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM MMCommunicate service that could result in an out-of-bounds write within the UEFI-MM Secure Partition context.","status":"published","published":"2025-12-16T18:16:13.607Z","modified":"2026-10-13T11:10:00.203Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:11:51.309584Z"}]}}