{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-66279", "assignerOrgId": "030b2754-1501-44a4-bef8-48be86a33bf4", "state": "PUBLISHED", "assignerShortName": "Silabs", "dateReserved": "2026-07-24T13:33:53.357Z", "datePublished": "2026-10-22T13:41:03.391Z", "dateUpdated": "2026-10-23T10:56:10.379Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "030b2754-1501-44a4-bef8-48be86a33bf4", "shortName": "Silabs", "dateUpdated": "2026-10-22T16:01:08.434Z" }, "title": "Dis-connect vulnerability in Connect Stack", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-940", "description": "CWE-940: Improper Verification of Source of a Communication Channel", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-115", "descriptions": [ { "lang": "en", "value": "CAPEC-115: Authentication Bypass, CAPEC-176: Configuration/Environment Manipulation" } ] } ], "affected": [ { "vendor": "Silicon Labs", "product": "Connect SDK", "repo": "https://github.com/SiliconLabs/simplicity_sdk", "versions": [ { "status": "affected", "version": "4.0.0", "lessThanOrEqual": "4.3.1", "versionType": "semver" }, { "status": "affected", "version": "0", "lessThanOrEqual": "3.7.7", "versionType": "semver" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "In Connect SDK 4.3.1 and earlier and Flex SDK 3.7.7 and earlier, a message with invalid security settings may bypass authentication resulting in network disruption. This vulnerability does not allow an attacker to gain the Network Key or otherwise break confidentiality.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "In Connect SDK 4.3.1 and earlier and Flex SDK 3.7.7 and earlier, a message with invalid security settings may bypass authentication resulting in network disruption. This vulnerability does not allow an attacker to gain the Network Key or otherwise break confidentiality." } ] } ], "references": [ { "url": "https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000588.md", "tags": [ "vendor-advisory", "permissions-required" ] }, { "url": "https://github.com/SiliconLabsSoftware/sisdk-release/", "tags": [ "patch" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "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": "HIGH", "baseScore": 7.2, "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N" } } ], "credits": [ { "lang": "en", "value": "414B", "type": "reporter" } ], "source": { "discovery": "INTERNAL" }, "x_generator": { "engine": "Vulnogram 1.0.5" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-66279", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-10-23T10:49:30.602900Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-23T10:56:10.379Z" } } ] } }