CVE-2019-6321

Severity: high (CVSS 7.2 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-05-29 · updated 2026-06-17
Weakness: CWE-667

Description

HP has identified a security vulnerability with some versions of Workstation BIOS (UEFI Firmware) where the runtime BIOS code could be tampered with if the TPM is disabled. This vulnerability relates to Workstations whose TPM is disabled by default.

Affected products

HP Z4 G4 Core-X Workstation Firmware: before 1.70 — fixed in 1.70
HP Z4 G4 Workstation Firmware: before 1.70 — fixed in 1.70
HP Z6 G4 Workstation Firmware: before 1.71 — fixed in 1.71
HP Z8 G4 Workstation Firmware: before 1.71 — fixed in 1.71

How to fix

Upgrade to a fixed version: HP Z4 G4 Core-X Workstation Firmware 1.70; HP Z4 G4 Workstation Firmware 1.70; HP Z6 G4 Workstation Firmware 1.71; HP Z8 G4 Workstation Firmware 1.71. Check the vendor advisory for mitigations.

References

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