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

Source: https://junglewise.ai/threats/cve-2025-2486-the-ubuntu-edk2-uefi-firmware-packages-accidentally-allowed-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-26  
License: CC BY 4.0 with a link back

CVE-2025-2486 · Severity: high · CVSS 8.8 · Published 2025-11-26

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.

Technologies: [Tianocore Edk2](https://junglewise.ai/threats/technologies/edk2). Vendors: [Tianocore](https://junglewise.ai/threats/vendors/tianocore).

## Quick answers

**Is CVE-2025-2486 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-2486 being exploited in the wild.

**How severe is CVE-2025-2486?** High severity, with a CVSS score of 8.8, published 26 November 2025.

**Which products and versions are affected?** Tianocore Edk2. The advisory does not name versions.

**Is there a fix for CVE-2025-2486?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-2486?** Check whether you run Tianocore Edk2. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Tianocore Edk2

## Related threats

- [EDK2 SMRAM information disclosure during transient execution](https://junglewise.ai/threats/cve-2026-18448-edk2-contains-a-vulnerability-in-bios-where-a-privileged-attacker)
- [EDK2 MmSaveStateLib out-of-bounds write in AMD SysCall path](https://junglewise.ai/threats/cve-2026-14968-edk2-contains-vulnerabilities-in-bios-where-skilled-and)
- [EDK2 buffer overflow in PXE driver pre-boot RCE](https://junglewise.ai/threats/cve-2026-97631-edk2-contains-a-vulnerability-in-bios-where-a-user-may-cause-out)