{"id":"CVE-2026-2815","aliases":["EUVD-2026-39394","GHSA-f2cj-j66g-55wj"],"status":"published","title":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","description":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","severity":{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00251,"percentile":0.16574,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-339"],"published":"2026-06-25T13:27:45Z","modified":"2026-10-28T02:30:28Z","products":[{"vendor":"silabs.com","product":"sisdk"},{"vendor":"silicon labs","product":"sisdk"}],"references":[{"url":"https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm00000kDYsfIAG?operationContext=S1","tags":["vendor-advisory","permissions-required","report"]},{"url":"https://github.com/SiliconLabsSoftware/sisdk-release","tags":["patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2815","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-f2cj-j66g-55wj"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2815.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-2815","title":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","description":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","status":"published","published":"2026-06-25T13:27:45.446Z","modified":"2026-06-25T14:03:49.129Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-339"],"updated_at":"2026-11-02T13:48:46.911326Z"}],"euvd":[{"id":"EUVD-2026-39394","description":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","status":"published","published":"2026-06-25T13:27:45Z","modified":"2026-06-25T14:03:49Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high"}],"updated_at":"2026-11-02T18:20:29.213001Z"}],"ghsa":[{"id":"GHSA-f2cj-j66g-55wj","title":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","description":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","status":"published","published":"2026-06-25T15:32:00Z","modified":"2026-06-25T15:32:08Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/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-339"],"updated_at":"2026-11-02T15:08:58.724463Z"}],"nvd":[{"id":"CVE-2026-2815","description":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","status":"published","published":"2026-06-25T14:16:37.067Z","modified":"2026-10-25T23:10:00.167Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/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-339"],"updated_at":"2026-11-02T14:12:26.045561Z"}],"osv":[{"id":"CVE-2026-2815","title":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","description":"Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys","status":"published","published":"2026-06-25T13:27:45.446Z","modified":"2026-10-28T02:30:28.559846444Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high"}],"cwes":["CWE-339"],"updated_at":"2026-11-02T15:45:00.180685Z"}]}}