Vulnerability · Published Sep 7, 2026 · Assigned by YesWeHack
CVE-2026-18796QSPI flash encryption side-channel leakage
Medium 6.8
In plain English
A medium-severity security flaw in nRF5340 from Nordic Semiconductor ASA. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Severity (CVSS 4.0)6.8Medium
Exploit odds (30 days)0.1%top 99.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Any application that uses external QSPI flash for encrypted XIP on nRF5340 and relies on that encryption for confidentiality and/or integrity of the externally stored code. No specific nRF Connect SDK version is the root cause; the weakness is in the on-the-fly decryption scheme.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Nordic Semiconductor ASA | nRF5340 | All build codes |
Weakness: CWE-1342 · Vector: CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N