{"id":"CVE-2026-66279","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-66279","generatedAt":"2026-10-28T02:21:48.918Z","title":"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.","description":"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.","published":"2026-10-22T14:17:44.000Z","lastModified":"2026-10-23T12:18:16.000Z","status":"Awaiting Analysis","sourceIdentifier":"product-security@silabs.com","cvss":{"version":"4.0","score":7.2,"severity":"HIGH","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-940"],"affected":[],"epss":{"score":0.00245,"percentile":0.15631,"date":"2026-10-26","history":[{"date":"2026-10-23","score":0.00245,"percentile":0.14898}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-22T14:17:44.000Z","detail":{"score":"7.2","severity":"HIGH","publishedAt":"2026-10-22T14:17:43.840Z"},"summary":"New CVE, high severity (CVSS 7.2)."}],"references":[{"url":"https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000588.md","source":"product-security@silabs.com"},{"url":"https://github.com/SiliconLabsSoftware/sisdk-release/","source":"product-security@silabs.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-66279","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}