CVE-2025-4276

highpriority · track · 0EPSS 0.001 · 4 %ileDEEU

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.14% (4th) EPSS

CVSS 7.5 · high

Is it mine?

9 products

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-28

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

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondaryexploitability 0.8 · impact 6

v3.16.9mediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

The CWE weakness classes this flaw belongs to.

Products and version ranges known to be affected.

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1801Insyde UEFI Firmware: Mehrere Schwachstellen ermöglichen CodeausführungDeutsch2025-08-12csaf · cert_bundDE
Ein privilegierter lokaler Angreifer kann mehrere Schwachstellen in Insyde UEFI Firmware ausnutzen, um beliebigen Programmcode auszuführen.

Other names and identifiers for this entity.

Which sources assert this record, and when.

published 2025-08-13modified 2026-06-17

External citations — patches, advisories, analysis.

scry

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