CVE-2026-18796

QSPI flash encryption side-channel leakage

Published Sep 7, 2026 CVSS 4.0 · 6.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Nordic Semiconductor Asa
Nordic Semiconductor Asa nrf5340
Vendors & Products Nordic Semiconductor Asa
Nordic Semiconductor Asa nrf5340
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title QSPI flash encryption side-channel leakage
Weaknesses CWE-1342
References
Metrics cvssV4_0

{'score': 6.8, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
YesWeHack
Published
Updated
Sep 10, 2026, 11:17 AM
Reserved
Aug 4, 2026, 9:40 AM
Status
Awaiting Analysis
Published
Sep 7, 2026, 9:17 AM
Modified
Sep 9, 2026, 3:50 PM