{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18796", "assignerOrgId": "30a5e7fb-040d-440a-8cdf-a4a2068ce72e", "state": "PUBLISHED", "assignerShortName": "YesWeHack", "dateReserved": "2026-08-04T09:40:15.178Z", "datePublished": "2026-09-07T08:07:31.633Z", "dateUpdated": "2026-09-07T08:07:31.633Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "30a5e7fb-040d-440a-8cdf-a4a2068ce72e", "shortName": "YesWeHack", "dateUpdated": "2026-09-07T08:07:31.633Z"}, "title": "QSPI flash encryption side-channel leakage", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-1342", "description": "CWE-1342 Information exposure through microarchitectural state after transient execution", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-37", "descriptions": [{"lang": "en", "value": "CAPEC-37 Retrieve Embedded Sensitive Data"}]}], "affected": [{"vendor": "Nordic Semiconductor ASA", "product": "nRF5340", "versions": [{"status": "affected", "version": "All build codes"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Any application that\n uses external QSPI flash for encrypted XIP on nRF5340 and relies on that\n encryption for confidentiality and/or integrity of the externally stored\n code. No specific nRF Connect SDK version is the root cause; the weakness\n is in the on-the-fly decryption scheme.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<span>Any application that\n uses external QSPI flash for encrypted XIP on nRF5340 and relies on that\n encryption for confidentiality and/or integrity of the externally stored\n code. No specific nRF Connect SDK version is the root cause; the weakness\n is in the on-the-fly decryption scheme.</span><br>"}]}], "references": [{"url": "https://docs.nordicsemi.com/r/bundle/struct_sa/page/struct/sa.html"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "PHYSICAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6.8, "vectorString": "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"}}], "credits": [{"lang": "en", "value": "Reported externally through PSIRT by Dani\u00ebl Eijkmann and Damian Viz\u00e1r (CSEM)", "type": "reporter"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "nRF5340", "vendor": "Nordic Semiconductor ASA", "versions": [{"status": "affected", "version": "All build codes"}]}], "source": "30a5e7fb-040d-440a-8cdf-a4a2068ce72e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Any application that\n uses external QSPI flash for encrypted XIP on nRF5340 and relies on that\n encryption for confidentiality and/or integrity of the externally stored\n code. No specific nRF Connect SDK version is the root cause; the weakness\n is in the on-the-fly decryption scheme."}], "id": "CVE-2026-18796", "lastModified": "2026-09-07T09:17:15.570", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "PHYSICAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "30a5e7fb-040d-440a-8cdf-a4a2068ce72e", "type": "Secondary"}]}, "published": "2026-09-07T09:17:15.570", "references": [{"source": "30a5e7fb-040d-440a-8cdf-a4a2068ce72e", "url": "https://docs.nordicsemi.com/r/bundle/struct_sa/page/struct/sa.html"}], "sourceIdentifier": "30a5e7fb-040d-440a-8cdf-a4a2068ce72e", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1342"}], "source": "30a5e7fb-040d-440a-8cdf-a4a2068ce72e", "type": "Secondary"}]}

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