Unauthorized Slot Verification in MCUboot Affects Nordic Semiconductor Products
CVE-2026-14296

7.5HIGH

Key Information:

Vendor

Nordic Semiconductor Asa

Status
Nrf54h20
Vendor
CVE Published:
7 September 2026

What is CVE-2026-14296?

A vulnerability exists in MCUboot where the Direct XIP update strategy allows the main application to initiate other cores based solely on the current active slot, without appropriate verification measures. The bare configuration of MCUboot presumes that having one slot available for each image signals the system's bootability. Consequently, this oversight may result in the system booting from an incorrect slot, causing a deployment of different images, such as executing a radio application from an unauthorized slot instead of the designated one.

Affected Version(s)

nRF54H20 3.2

nRF54H20 3.3

References

https://docs.nordicsemi.com/r/bundle/struct_sa/page/struc...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Reported externally through PSIRT
.