How severe is CVE-2025-2486?

CVE-2025-2486 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-2486 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-2486?

CVE-2025-2486 primarily affects Tianocore Edk2. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-2486?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-2486 have an EU (EUVD) identifier?

Yes. CVE-2025-2486 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199745.

When was CVE-2025-2486 published?

CVE-2025-2486 was published on 2025-11-26 and last updated on 2026-06-17.

CVE-2025-2486

CVE-2025-2486 is a high-severity vulnerability in Tianocore Edk2 with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-489.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 3.7
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-199745
Weakness: CWE-489
Affected product: Tianocore Edk2
Published: 2025-11-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-2486?: CVE-2025-2486 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-2486 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-2486?: CVE-2025-2486 primarily affects Tianocore Edk2. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-2486?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-2486 have an EU (EUVD) identifier?: Yes. CVE-2025-2486 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199745.
When was CVE-2025-2486 published?: CVE-2025-2486 was published on 2025-11-26 and last updated on 2026-06-17.

References

https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2101797

Affected products (2)

cpe:2.3:a:tianocore:edk2:202402*:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:202405:*:*:*:*:*:*:*

More vulnerabilities in Tianocore Edk2

CVE-2023-45235 — High (CVSS 8.3): EDK2's Network Package is susceptible to a buffer overflow vulnerability when handling Server ID option from…
CVE-2023-45234 — High (CVSS 8.3): EDK2's Network Package is susceptible to a buffer overflow vulnerability when processing DNS Servers option from a…
CVE-2023-45230 — High (CVSS 8.3): EDK2's Network Package is susceptible to a buffer overflow vulnerability via a long server ID option in DHCPv6 client.…
CVE-2021-38575 — High (CVSS 8.1): NetworkPkg/IScsiDxe has remotely exploitable buffer overflows.
CVE-2019-14586 — High (CVSS 8.0): Use after free vulnerability in EDK II may allow an authenticated user to potentially enable escalation of privilege,…
CVE-2021-28210 — High (CVSS 7.8): An unlimited recursion in DxeCore in EDK II.

All CVEs affecting Tianocore Edk2 →

Other CWE-489 vulnerabilities

CVE-2023-4804 — Critical (CVSS 10.0): An unauthorized user could access debug features in Quantum HD Unity products that were accidentally exposed.
CVE-2026-49188 — Critical (CVSS 9.8): The ai_cmd utility executes with full root permissions. It pipes socket inputs directly to popen(), paving the way…
CVE-2024-46873 — Critical (CVSS 9.8): Multiple SHARP routers leave the hidden debug function enabled. An arbitrary OS command may be executed with the root…
CVE-2024-21785 — Critical (CVSS 9.8): A leftover debug code vulnerability exists in the Telnet Diagnostic Interface functionality of AutomationDirect P3-550E…
CVE-2024-32047 — Critical (CVSS 9.8): Hard-coded credentials for the CyberPower PowerPanel test server can be found in the production code. This might…
CVE-2024-28008 — Critical (CVSS 9.8): Active Debug Code in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, WG1800HP3, WG1200HS2, WG1900HP,…

Browse all CWE-489 vulnerabilities →