CVE-2021-3661
Estado: ModificadaAlta (8.4)—
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.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 8.4
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.32%
- Percentil entre todas las CVEs puntuadas: 23
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (20)
HP — Z1 All-in-one G3 FirmwareHP — Z238 Microtower FirmwareHP — Z240 Small Form Factor FirmwareHP — Z240 Tower FirmwareHP — Z2 Mini G3 FirmwareHP — Z2 Mini G4 FirmwareHP — Z2 Mini G5 FirmwareHP — Z2 Small Form Factor G4 FirmwareHP — Z2 Small Form Factor G5 FirmwareHP — Z2 Small Form Factor G8 FirmwareHP — Z2 Tower G4 FirmwareHP — Z2 Tower G5 FirmwareHP — Z2 Tower G8 FirmwareHP — Z440 FirmwareHP — Z4 G4 FirmwareHP — Z640 FirmwareHP — Z6 G4 FirmwareHP — Z840 FirmwareHP — Z8 G4 FirmwareHP — Zcentral 4R Firmware
CWE
- NVD-CWE-noinfo
- CWE-94
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-3661",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-3661",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2025-04-29T04:42:25.285217Z"
}
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.4,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.5
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.4,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.5
}
]
},
"affected": [
{
"source": "hp-security-alert@hp.com",
"affectedData": [
{
"vendor": "HP Inc.",
"product": "HP Workstation BIOS",
"versions": [
{
"status": "affected",
"version": "See HP Security Bulletin reference for affected versions."
}
]
}
]
}
],
"published": "2022-12-12T13:15:11.693",
"references": [
{
"url": "https://support.hp.com/us-en/document/ish_5670997-5671021-16/hpsbhf03770",
"tags": [
"Vendor Advisory"
],
"source": "hp-security-alert@hp.com"
},
{
"url": "https://support.hp.com/us-en/document/ish_5670997-5671021-16/hpsbhf03770",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-94"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Se ha identificado una posible vulnerabilidad de seguridad en HP Workstation BIOS (firmware UEFI) que puede permitir la ejecución de código arbitrario. HP está lanzando mitigaciones de firmware para la posible vulnerabilidad."
}
],
"lastModified": "2026-06-17T04:05:31.487",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z1_all-in-one_g3_firmware:01.31:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "52CB7D08-E352-49F5-8715-5055DDBDBD5B"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z1_all-in-one_g3:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "31DD86B2-0702-45EB-9CFE-E1F363E21CB3"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z2_mini_g3_firmware:01.83:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1C60E47B-10F8-4238-9CED-979915F10C53"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z2_mini_g3:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4E8E325E-4FB5-4BBD-8301-3655EE4C8E82"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z2_mini_g4_firmware:01.08.01:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "68BFE14B-F4C7-460E-B075-40E413C437D2"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z2_mini_g4:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "2AAB843A-8C23-4155-AA9A-A9638844B649"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z2_mini_g5_firmware:01.03.00_rev_a:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "30EF73CD-3EFC-41E6-99D2-EA225F9A2996"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z2_mini_g5:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "6A6F7EA4-D933-4043-8443-DB2D042161B7"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z2_small_form_factor_g4_firmware:01.08.01:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B369AF9A-02BC-4105-91AD-AAABAB25371E"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z2_small_form_factor_g4:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "28D8DCE4-417D-447E-B30C-44B2AAE950F1"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z2_small_form_factor_g5_firmware:01.03.00_rev_a:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "51440732-CE12-41FF-95AD-3D98511741B2"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z2_small_form_factor_g5:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "078C37DD-2BF5-40D0-8607-38D290DF3C92"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z2_small_form_factor_g8_firmware:01.03.00_rev_a:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "78099425-DF2D-4D4E-B4CA-AC547DBDFC9F"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z2_small_form_factor_g8:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "5D3E8CE5-62F0-47ED-A8AC-47E7AC1920FB"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z2_tower_g4_firmware:01.08.01:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5D924016-9A41-4C27-BA5F-7B50C065097B"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z2_tower_g4:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "E8CAC1DA-DC4B-470C-A351-278833DEF95A"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z2_tower_g5_firmware:01.03.00_rev_a:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B13189CB-2B18-4878-A623-3A58D933F2B5"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z2_tower_g5:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "62BD85D3-FE64-4879-8D6F-BD833DF70C72"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z2_tower_g8_firmware:01.03.00_rev_a:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A89C5A54-D2FC-4686-ACA7-AC3719617F7D"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z2_tower_g8:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "CEB82416-14CC-40F5-B1C0-1157A3EE7CFF"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z238_microtower_firmware:01.83:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9F88D2DE-32FD-4490-BC0A-760966C22901"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z238_microtower:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4463B53C-10C9-4FCC-B209-7D3D0C04DF72"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z240_small_form_factor_firmware:01.83:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "81E7AEB0-6D4D-4DE9-A9F6-EC8BF3DC62D2"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z240_small_form_factor:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "0EA50241-E9BA-4B45-8450-76E83E64EB4D"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z240_tower_firmware:01.83:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E96E9CDC-1F2E-4F17-8A16-0F9B6E6926D6"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z240_tower:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "22F00DA1-F06E-4684-AFDD-540F4A95D25E"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z4_g4_firmware:02.75:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "216E6993-EC43-4A51-971F-F92AC8DDECFF"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z4_g4:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "30BA646E-8BC4-4EFF-85A2-5F67781151A6"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z440_firmware:2.58:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5CAEEACE-2F7A-429C-96A0-94784BA7DCB0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z440:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "C2561F9F-C603-46AA-A6FD-7BF864DA46C7"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z6_g4_firmware:02.75:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CF1E074E-6EFC-4265-BD06-D9DDDC75C3DF"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z6_g4:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "031EB2C6-6DC9-40FF-9720-B667BCAB6643"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z640_firmware:2.58:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "ACA5EDF8-AC00-4C0E-B0F3-43A61680553B"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z640:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "F0ABEB94-77A8-413D-A133-955BC1C59D84"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z8_g4_firmware:02.75:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "531759D8-8F35-46C7-8580-6AB503125264"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z8_g4:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "6A13690A-BCCD-4C6A-93A5-B4B889823AA7"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:z840_firmware:2.58:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1908464A-E5AC-4636-A524-BF7BD147D572"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:z840:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4E24183E-7790-425B-85C7-DBA62DE9DD2F"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:hp:zcentral_4r_firmware:01.18:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E8466E68-60E7-4332-BDF8-221EEEA81A5C"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:hp:zcentral_4r:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "619F29C4-D227-4DFC-9DC2-828CA4F94A37"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "hp-security-alert@hp.com"
}