{"id":"CVE-2026-4930","aliases":["EUVD-2026-39534","GHSA-7ccr-fw66-p8jj"],"status":"published","title":"DPA Countermeasures weakening on Series 3 devices","description":"SYMCRYPTO is the SiXG301's host side hardware engine accessed by PSA crypto library that accelerates symmetric cryptographic operations (AES encryption/decryption and hashing).\n\n\nDPA Countermeasures on SYMCRYPTO can be weakened (reduced entropy) by forcing certain seed values if an attacker gains code execution capability on the impacted device.\n\n  *  Therefore, the keys loaded on SYMCRYPTO may be more vulnerable to extraction through DPA attacks than intended","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00139,"percentile":0.03319,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-331"],"published":"2026-06-25T18:39:26Z","modified":"2026-10-25T22:10:00Z","products":[{"vendor":"silabs.com","product":"simplicity sdk"}],"references":[{"url":"https://community.silabs.com/068Vm00000sjHs3","tags":["third-party-advisory","permissions-required"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4930"},{"url":"https://github.com/advisories/GHSA-7ccr-fw66-p8jj"}],"sources":{"cve":[{"id":"CVE-2026-4930","title":"DPA Countermeasures weakening on Series 3 devices","description":"SYMCRYPTO is the SiXG301's host side hardware engine accessed by PSA crypto library that accelerates symmetric cryptographic operations (AES encryption/decryption and hashing).\n\n\nDPA Countermeasures on SYMCRYPTO can be weakened (reduced entropy) by forcing certain seed values if an attacker gains code execution capability on the impacted device.\n\n  *  Therefore, the keys loaded on SYMCRYPTO may be more vulnerable to extraction through DPA attacks than intended","status":"published","published":"2026-06-25T18:39:26.379Z","modified":"2026-06-25T19:03:41.047Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H","level":"high","assessor":"cna"}],"cwes":["CWE-331"],"updated_at":"2026-11-02T14:19:59.369956Z"}],"euvd":[{"id":"EUVD-2026-39534","description":"SYMCRYPTO is the SiXG301's host side hardware engine accessed by PSA crypto library that accelerates symmetric cryptographic operations (AES encryption/decryption and hashing).\n\n\nDPA Countermeasures on SYMCRYPTO can be weakened (reduced entropy) by forcing certain seed values if an attacker gains code execution capability on the impacted device.\n\n  *  Therefore, the keys loaded on SYMCRYPTO may be more vulnerable to extraction through DPA attacks than intended","status":"published","published":"2026-06-25T18:39:26Z","modified":"2026-06-25T19:03:41Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H","level":"high"}],"updated_at":"2026-11-02T18:20:25.316004Z"}],"ghsa":[{"id":"GHSA-7ccr-fw66-p8jj","title":"SYMCRYPTO is the SiXG301's host side hardware engine accessed by PSA crypto library that...","description":"SYMCRYPTO is the SiXG301's host side hardware engine accessed by PSA crypto library that accelerates symmetric cryptographic operations (AES encryption/decryption and hashing).\n\n\nDPA Countermeasures on SYMCRYPTO can be weakened (reduced entropy) by forcing certain seed values if an attacker gains code execution capability on the impacted device.\n\n  *  Therefore, the keys loaded on SYMCRYPTO may be more vulnerable to extraction through DPA attacks than intended","status":"published","published":"2026-06-25T21:31:29Z","modified":"2026-06-25T21:31:38Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/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-331"],"updated_at":"2026-11-02T15:08:59.328511Z"}],"nvd":[{"id":"CVE-2026-4930","description":"SYMCRYPTO is the SiXG301's host side hardware engine accessed by PSA crypto library that accelerates symmetric cryptographic operations (AES encryption/decryption and hashing).\n\n\nDPA Countermeasures on SYMCRYPTO can be weakened (reduced entropy) by forcing certain seed values if an attacker gains code execution capability on the impacted device.\n\n  *  Therefore, the keys loaded on SYMCRYPTO may be more vulnerable to extraction through DPA attacks than intended","status":"published","published":"2026-06-25T19:16:39.103Z","modified":"2026-10-25T22:10:00.15Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/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-331"],"updated_at":"2026-11-02T14:12:26.045561Z"}]}}