{"id":"CVE-2026-16315","aliases":["EUVD-2026-53921","GHSA-5qgx-gc63-5xc9"],"status":"published","title":"Authentication and authorization bypass via cryptographic timing side-channel attack in StationGuard","description":"OMICRON StationGuard before version 4.10 contains a cryptographic timing side-channel vulnerability in the backend authentication mechanism that may allow an unauthenticated attacker to forge valid authentication credentials, bypass authentication and authorization, and impersonate legitimate clients.\nAn attacker can gain full access to the system configuration, allowing modification, reset, or unauthorized alteration of system parameters.","severity":{"version":"4.0","score":8.1,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00418,"percentile":0.36586,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-208"],"published":"2026-08-06T13:14:24Z","modified":"2026-10-23T21:10:00Z","products":[{"vendor":"omicron electronics gmbh","product":"omicron stationguard"}],"references":[{"url":"https://www.omicronenergy.com/.well-known/csaf/osa-21.json","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16315"},{"url":"https://github.com/advisories/GHSA-5qgx-gc63-5xc9"}],"sources":{"cve":[{"id":"CVE-2026-16315","title":"Authentication and authorization bypass via cryptographic timing side-channel attack in StationGuard","description":"OMICRON StationGuard before version 4.10 contains a cryptographic timing side-channel vulnerability in the backend authentication mechanism that may allow an unauthenticated attacker to forge valid authentication credentials, bypass authentication and authorization, and impersonate legitimate clients.\nAn attacker can gain full access to the system configuration, allowing modification, reset, or unauthorized alteration of system parameters.","status":"published","published":"2026-08-06T13:14:24.169Z","modified":"2026-08-06T14:44:35.82Z","cvss":[{"version":"4.0","score":8.1,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U","level":"high","assessor":"cna"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T14:20:11.24076Z"}],"euvd":[{"id":"EUVD-2026-53921","description":"OMICRON StationGuard before version 4.10 contains a cryptographic timing side-channel vulnerability in the backend authentication mechanism that may allow an unauthenticated attacker to forge valid authentication credentials, bypass authentication and authorization, and impersonate legitimate clients.\nAn attacker can gain full access to the system configuration, allowing modification, reset, or unauthorized alteration of system parameters.","status":"published","published":"2026-08-06T13:14:24Z","modified":"2026-08-06T14:44:35Z","cvss":[{"version":"4.0","score":8.1,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U","level":"high"}],"updated_at":"2026-11-02T18:02:08.553271Z"}],"ghsa":[{"id":"GHSA-5qgx-gc63-5xc9","title":"OMICRON StationGuard before version 4.10 contains a cryptographic timing side-channel...","description":"OMICRON StationGuard before version 4.10 contains a cryptographic timing side-channel vulnerability in the backend authentication mechanism that may allow an unauthenticated attacker to forge valid authentication credentials, bypass authentication and authorization, and impersonate legitimate clients.\nAn attacker can gain full access to the system configuration, allowing modification, reset, or unauthorized alteration of system parameters.","status":"published","published":"2026-08-06T15:32:43Z","modified":"2026-08-06T15:32:44Z","cvss":[{"version":"4.0","score":8.1,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/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"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T15:10:09.171432Z"}],"nvd":[{"id":"CVE-2026-16315","description":"OMICRON StationGuard before version 4.10 contains a cryptographic timing side-channel vulnerability in the backend authentication mechanism that may allow an unauthenticated attacker to forge valid authentication credentials, bypass authentication and authorization, and impersonate legitimate clients.\nAn attacker can gain full access to the system configuration, allowing modification, reset, or unauthorized alteration of system parameters.","status":"published","published":"2026-08-06T14:16:21.84Z","modified":"2026-10-23T21:10:00.157Z","cvss":[{"version":"4.0","score":8.1,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/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"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T14:12:35.031043Z"}]}}