Vulnerability details
CVE-2026-14296
Nordic Semiconductor ASA nRF54H20
nRF54H20: MCUBoot can be tricked to executing unauthenticated code
CVSS 3.1
7.5High
Official 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)).
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (YesWeHack) | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Nordic Semiconductor ASA | nRF54H20 | 3.2 | CVEProject cvelistV5 (CNA) |
| Nordic Semiconductor ASA | nRF54H20 | 3.3 | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-09-07
- Last updated
- 2026-09-08
- State
- Published
- Assigner (CNA)
- YesWeHack
Exploit prediction (EPSS)
0.16%
Probability of exploitation in 30 days
6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-347Improper verification of cryptographic signature