CVE-2021-39300

CVE-2021-39300 is a high-severity vulnerability in Hp Z1 Entry Tower G5 Workstation Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

• Severity: High (CVSS 3.x base score 8.8)
• CVSS v2: 7.2
• EPSS exploit prediction: 0% (33rd percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Hp Z1 Entry Tower G5 Workstation Firmware
• Published: 2022-02-16
• Last modified: 2026-06-17

Description

Potential vulnerabilities have been identified in UEFI firmware (BIOS) for some PC products which may allow escalation of privilege and arbitrary code execution.

Frequently asked questions

What is CVE-2021-39300?

Potential vulnerabilities have been identified in UEFI firmware (BIOS) for some PC products which may allow escalation of privilege and arbitrary code execution.

How severe is CVE-2021-39300?

CVE-2021-39300 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-39300 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39300?

CVE-2021-39300 primarily affects Hp Z1 Entry Tower G5 Workstation Firmware. In total, 195 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-39300?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-39300 published?

CVE-2021-39300 was published on 2022-02-16 and last updated on 2026-06-17.

References

• https://support.hp.com/us-en/document/ish_5661066-5661090-16

Affected products (195)

• cpe:2.3:o:hp:z1_entry_tower_g5_workstation_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:z1_entry_tower_g6_workstation_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:z1_g8_tower_desktop_pc_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:z4_g4_workstation_\(core-x\)_firmware:*:*:*:*:*:linux_kernel:*:*
• cpe:2.3:o:hp:z4_g4_workstation_\(core-x\)_firmware:*:*:*:*:*:windows_10:*:*
• cpe:2.3:o:hp:z4_g4_workstation_\(core-x\)_firmware:*:*:*:*:*:windows_7:*:*
• cpe:2.3:o:hp:z4_g4_workstation_\(xeon_w\)_firmware:*:*:*:*:*:linux_kernel:*:*
• cpe:2.3:o:hp:z4_g4_workstation_\(xeon_w\)_firmware:*:*:*:*:*:windows_10:*:*
• cpe:2.3:o:hp:z4_g4_workstation_\(xeon_w\)_firmware:*:*:*:*:*:windows_7:*:*
• cpe:2.3:o:hp:z6_g4_workstation_firmware:*:*:*:*:*:linux_kernel:*:*
• cpe:2.3:o:hp:z6_g4_workstation_firmware:*:*:*:*:*:windows_10:*:*
• cpe:2.3:o:hp:z6_g4_workstation_firmware:*:*:*:*:*:windows_7:*:*
• cpe:2.3:o:hp:z8_g4_workstation_firmware:*:*:*:*:*:linux_kernel:*:*
• cpe:2.3:o:hp:z8_g4_workstation_firmware:*:*:*:*:*:windows_10:*:*
• cpe:2.3:o:hp:z8_g4_workstation_firmware:*:*:*:*:*:windows_7:*:*
• cpe:2.3:o:hp:engage_flex_mini_retail_system_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:mp9_g4_retail_system_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elite_dragonfly_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elite_dragonfly_g2_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elite_dragonfly_max_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elite_x2_1013_g3_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elite_x2_g4_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elite_x2_g8_tablet_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_1050_g1_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_830_g5_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_830_g6_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_830_g7_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_830_g8_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_836_g5_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_836_g6_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_840_aero_g8_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_840_g5_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_840_g5_healthcare_edition_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_840_g6_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_840_g6_healthcare_edition_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_840_g7_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_840_g8_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_840r_g4_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_846_g5_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:hp:elitebook_850_g5_firmware:*:*:*:*:*:*:*:*

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