{"id":"CVE-2021-3661","aliases":["EUVD-2021-26956","GHSA-8r2c-p9ww-m55w"],"status":"published","title":"A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI...","description":"A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI firmware) which may allow arbitrary code execution. HP is releasing firmware mitigations for the potential vulnerability.","severity":{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0032,"percentile":0.2523,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-94"],"published":"2022-11-21T21:19:42Z","modified":"2026-06-17T04:05:31Z","products":[{"vendor":"hp","product":"z1_all-in-one_g3_firmware"},{"vendor":"hp","product":"z238_microtower_firmware"},{"vendor":"hp","product":"z240_small_form_factor_firmware"},{"vendor":"hp","product":"z240_tower_firmware"},{"vendor":"hp","product":"z2_mini_g3_firmware"},{"vendor":"hp","product":"z2_mini_g4_firmware"},{"vendor":"hp","product":"z2_mini_g5_firmware"},{"vendor":"hp","product":"z2_small_form_factor_g4_firmware"},{"vendor":"hp","product":"z2_small_form_factor_g5_firmware"},{"vendor":"hp","product":"z2_small_form_factor_g8_firmware"},{"vendor":"hp","product":"z2_tower_g4_firmware"},{"vendor":"hp","product":"z2_tower_g5_firmware"},{"vendor":"hp","product":"z2_tower_g8_firmware"},{"vendor":"hp","product":"z440_firmware"},{"vendor":"hp","product":"z4_g4_firmware"},{"vendor":"hp","product":"z640_firmware"},{"vendor":"hp","product":"z6_g4_firmware"},{"vendor":"hp","product":"z840_firmware"},{"vendor":"hp","product":"z8_g4_firmware"},{"vendor":"hp","product":"zcentral_4r_firmware"},{"vendor":"hp inc.","product":"hp workstation bios"}],"references":[{"url":"https://support.hp.com/us-en/document/ish_5670997-5671021-16/hpsbhf03770","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3661"},{"url":"https://github.com/advisories/GHSA-8r2c-p9ww-m55w"}],"sources":{"cve":[{"id":"CVE-2021-3661","description":"A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI firmware) which may allow arbitrary code execution. HP is releasing firmware mitigations for the potential vulnerability.","status":"published","published":"2022-11-21T21:19:42.95Z","modified":"2025-04-29T04:44:48.739Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:33:04.020035Z"}],"euvd":[{"id":"EUVD-2021-26956","description":"A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI firmware) which may allow arbitrary code execution. HP is releasing firmware mitigations for the potential vulnerability.","status":"published","published":"2022-11-21T21:19:42Z","modified":"2025-04-29T04:44:48Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:00.974547Z"}],"ghsa":[{"id":"GHSA-8r2c-p9ww-m55w","title":"A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI...","description":"A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI firmware) which may allow arbitrary code execution. HP is releasing firmware mitigations for the potential vulnerability.","status":"published","published":"2022-12-12T15:30:32Z","modified":"2025-04-29T06:31:39Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:02:03.587511Z"}],"nvd":[{"id":"CVE-2021-3661","description":"A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI firmware) which may allow arbitrary code execution. HP is releasing firmware mitigations for the potential vulnerability.","status":"published","published":"2022-12-12T13:15:11.693Z","modified":"2026-06-17T04:05:31.487Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:07:07.323379Z"}]}}