{"id":"CVE-2026-66279","aliases":["EUVD-2026-108179","GHSA-x89v-v3m8-qmhg"],"status":"published","title":"Dis-connect vulnerability in Connect Stack","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.","severity":{"version":"4.0","score":7.2,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00245,"percentile":0.15907,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-940"],"published":"2026-10-22T13:41:03Z","modified":"2026-10-23T12:18:15Z","products":[{"vendor":"silicon labs","product":"connect sdk"}],"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"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66279"},{"url":"https://github.com/SiliconLabsSoftware/sisdk-release"},{"url":"https://github.com/advisories/GHSA-x89v-v3m8-qmhg"}],"sources":{"cve":[{"id":"CVE-2026-66279","title":"Dis-connect vulnerability in Connect Stack","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.","status":"published","published":"2026-10-22T13:41:03.391Z","modified":"2026-10-23T10:56:10.379Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high","assessor":"cna"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T14:20:12.939084Z"}],"euvd":[{"id":"EUVD-2026-108179","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.","status":"published","published":"2026-10-22T13:41:03Z","modified":"2026-10-23T10:56:10Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high"}],"updated_at":"2026-11-02T16:59:33.058354Z"}],"ghsa":[{"id":"GHSA-x89v-v3m8-qmhg","title":"In Connect SDK 4.3.1 and earlier and Flex SDK 3.7.7 and earlier, a message with invalid security...","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.","status":"published","published":"2026-10-22T15:32:49Z","modified":"2026-10-22T15:32:56Z","cvss":[{"version":"4.0","score":7.2,"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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T15:14:16.352322Z"}],"nvd":[{"id":"CVE-2026-66279","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.","status":"published","published":"2026-10-22T14:17:43.84Z","modified":"2026-10-23T12:18:15.66Z","cvss":[{"version":"4.0","score":7.2,"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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T14:13:02.724605Z"}]}}