CVE-2021-39298

CVE-2021-39298 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% (34th 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

A potential vulnerability in AMD System Management Mode (SMM) interrupt handler may allow an attacker with high privileges to access the SMM resulting in arbitrary code execution which could be used by malicious actors to bypass security mechanisms provided in the UEFI firmware.

Frequently asked questions

What is CVE-2021-39298?

A potential vulnerability in AMD System Management Mode (SMM) interrupt handler may allow an attacker with high privileges to access the SMM resulting in arbitrary code execution which could be used by malicious actors to bypass security mechanisms provided in the UEFI firmware.

How severe is CVE-2021-39298?

CVE-2021-39298 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-2021-39298 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39298?

CVE-2021-39298 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-2021-39298?

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-2021-39298 published?

CVE-2021-39298 was published on 2022-02-16 and last updated on 2026-06-17.

References

• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1027
• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032

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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