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Vulnerability record · CVE-2021-3661 · published 12 December 2022

CVE-2021-3661: Hp z1 all-in-one g3 firmware code injection vulnerability

Hp · Z1 All In One G3 Firmware

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.

8.4 CVSS 3.1 High EPSS 0.32% · top 76.9% CWE-94 · Code injection
8.4CVSS 3.1 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
20Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

20 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.hp.com/us-en/document/ish_5670997-5671021-16/hpsbhf03770 Vendor Advisory
https://support.hp.com/us-en/document/ish_5670997-5671021-16/hpsbhf03770 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.4CVE-2022-37018Hp z1 g3 firmware incorrect default permissions vulnerabilityA potential vulnerability has been identified in the system BIOS for certain HP PC products which may allow escalation of privileges and code executi…EPSS 0.24%7.2CVE-2019-16284Hp 260 g1 dm firmware vulnerabilityA potential security vulnerability has been identified in multiple HP products and versions which involves possible execution of arbitrary code durin…EPSS 2.0%

Source: NIST National Vulnerability Database (record CVE-2021-3661), CISA KEV, FIRST EPSS (scores of 2026-10-18). This page is refreshed as NVD updates the record.