VulnerabilityDeferred

CVE-2025-4276

UsbCoreDxe has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.

HIGH 7.5EPSS 0.14%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

UsbCoreDxe has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.14% probability · 4th percentile
CISA KEV: Not listed
Weakness: CWE-20
Source: 8338d8cb-57f7-4252-abc0-96fd13e98d21

References

https://www.insyde.com/security-pledge/sa-2025005/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.