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CVE-2026-14296— nRF54H20: MCUBoot can be tricked to executing unauthenticated code

Quick assessment

Affected
Nordic Semiconductor ASA nRF54H20
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在使用 Direct XIP 更新策略时，主应用映像会从当前活动插槽启动其他内核（即无线电内核），且不再进行额外的验证。 在裸机（上游）配置下，MCUboot 假设：只要每种映像至少有一个可用插槽，系统即被视为可启动，并继续执行启动流程。这可能导致 MCUboot 为不同的映像选择不同插槽（例如：(a) 用于主应用，(b) 用于无线电映像）。系统会启动来自主应用插槽 (a) 的主应用，该主应用在启动无线电映像时，却提供了未经验证的插槽地址（即使用了 (a) 而非 (b)）。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-14296

Vulnerability Information
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Vulnerability Title
nRF54H20: MCUBoot can be tricked to executing unauthenticated code
Source: CVE Program / CVE List V5
Vulnerability Description
When using the Direct XIP update strategy, the main application image starts other cores (i.e. radio core), based on the currently active slot without additional verification. The MCUboot in the bare (upstream) configuration assumes that if there is at least a single slot for each image available, the system is bootable and continues the boot process. This may lead to a situation when MCUboot picks different slot for different images (i.e. (a) for the main application and (b) for the radio image), boots the main application (from slot (a)) that afterwards starts the radio image by providing an address of the unauthenticated slot ((a) instead of (b)).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Nordic Semiconductor ASA nRF54H20 3.2 -

II. Public POCs for CVE-2026-14296

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III. Intelligence Information for CVE-2026-14296

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Other References for CVE-2026-14296 (1)

Same Patch Batch · Nordic Semiconductor ASA · 2026-09-07 · 3 CVEs total

CVE-2026-14297 8.7 HIGH The Continuous Glucose Monitoring Service's Record Access Control Point (RACP) write handl
CVE-2026-18796 6.8 MEDIUM QSPI flash encryption side-channel leakage

IV. Related Vulnerabilities

Same vendor: Nordic Semiconductor ASA
Same weakness: CWE-347

V. Comments for CVE-2026-14296

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