8.8

CVE-2025-2486: tianocore edk2 Active Debug Code

CVSS: 8.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2025-2486DEBIAN-CVE-2025-2486
Published 26-11-2025Last modified 26-11-2025
Open JSON

Vulnerability summary

CVE-2025-2486 is a high (CVSS 8.8) Active Debug Code vulnerability in tianocore edk2. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.3% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-11-2025
    PublishedVulnerability first disclosed.
  2. 26-11-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu2 products
  • edk2< 2024.02-2ubuntu0.3
  • edk2≥ 2024.05, < 2024.05-2ubuntu0.3 | ≥ 2024.02, < 2024.02-2ubuntu0.3
Debian1 product
  • edk2< 2022.11-6+deb12u1 | < 2023.11-7
Tianocore1 product
  • edk2202402* | 202405

3 vendors · 4 products

References

4 links