CVE-2025-2486: The Ubuntu edk2 UEFI firmware packages accidentally allowed the UEFI Shell to be accessed in Secure Boot envir

Routine

HIGH 8.8WATCHLISTMITIGATE

CVE-2025-2486 is a high-severity flaw (CVSS 8.8) affecting edk2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 o

Why this priority

High severity
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-489
Published	2025-11-26
Last modified	2026-10-18

Publisher (CNA): Canonical Ltd. · Vendor: tianocore

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-26 18:15 UTCPublished CVE record published
2026-10-18 20:10 UTCUpdated Record last modified

tianocore edk2 MITIGATE

Affected: 202402* · 202405

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy edk2 || rpm -q edk2 || edk2 --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-2486?

edk2: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-2486 being exploited?

CVE-2025-2486 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-2486 affect?

CVE-2025-2486 affects edk2. Severity is high (CVSS 8.8). 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

How urgent is CVE-2025-2486?

Priority 37/100. High severity; On your watchlist

Software pages

Ubuntu vulnerabilities

References

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