What is CVE-2025-2486?

CVE-2025-2486 is a high-severity vulnerability in Tianocore Edk2, classified under Active Debug Code. CVSS score: 8.8/10. Published 2025-11-26.

How severe is CVE-2025-2486?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Tianocore Edk2

CVE-2025-2486

The Ubuntu edk2 UEFI firmware packages accidentally allowed the UEFI Shell to be accessed in Secure Boot environments, possibly allowing bypass of Secure Boot constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based decision to continue running inside the Shell itself, which is believed to be sufficient to enforce Secure Boot restrictions. This is an additional repair on top of the incomplete fix for CVE-2023-48733.

EPSS: 0.001 (2.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Tianocore Edk2 — versions 202402*, 202405
Ubuntu Edk2 — versions 2024.05, 2024.02

Weakness classification (CWE)

CWE-489 — Active Debug Code

References

security@ubuntu.com (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2025-2486?: CVE-2025-2486 is a high-severity vulnerability in Tianocore Edk2, classified under Active Debug Code. CVSS score: 8.8/10. Published 2025-11-26.
How severe is CVE-2025-2486?: High severity. CVSS v3 base score is 8.8 out of 10.