{"id":"CVE-2026-18796","state":"PUBLISHED","title":"QSPI flash encryption side-channel leakage","description":"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.","publishedAt":"2026-09-07T08:07:31.633Z","updatedAt":"2026-09-10T11:17:10.632Z","severity":{"score":6.8,"label":"Medium","version":"4.0","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","source":"YesWeHack"},"assigner":"YesWeHack","products":["Nordic Semiconductor ASA nRF5340"],"affected":[{"vendor":"Nordic Semiconductor ASA","product":"nRF5340","defaultStatus":"unaffected","versions":[{"version":"All build codes","status":"affected"}]}],"references":["https://docs.nordicsemi.com/r/bundle/struct_sa/page/struct/sa.html"],"weaknesses":["CWE-1342"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/18xxx/CVE-2026-18796.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-18796","state":"PUBLISHED","datePublished":"2026-09-07T08:07:31.633Z","dateUpdated":"2026-09-10T11:17:10.632Z","assignerShortName":"YesWeHack","assignerOrgId":"30a5e7fb-040d-440a-8cdf-a4a2068ce72e","dateReserved":"2026-08-04T09:40:15.178Z"},"containers":{"cna":{"title":"QSPI flash encryption side-channel leakage","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."}],"affected":[{"vendor":"Nordic Semiconductor ASA","product":"nRF5340","defaultStatus":"unaffected","versions":[{"version":"All build codes","status":"affected"}]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1342","lang":"en","description":"CWE-1342 Information exposure through microarchitectural state after transient execution","type":"CWE"}]}],"providerMetadata":{"shortName":"YesWeHack","orgId":"30a5e7fb-040d-440a-8cdf-a4a2068ce72e","dateUpdated":"2026-09-10T11:17:10.632Z"},"impacts":[{"capecId":"CAPEC-37","descriptions":[{"lang":"en","value":"CAPEC-37 Retrieve Embedded Sensitive Data"}]}],"credits":[{"lang":"en","value":"Reported externally through PSIRT by Daniël Eijkman and Damian Vizár (CSEM)","type":"reporter"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-08T15:01:20.642344Z","id":"CVE-2026-18796","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-08T15:01:26.689Z"}}]}}}