{"id":"CVE-2017-9855","aliases":["EUVD-2017-18765","GHSA-v4m3-hw9h-pqgx"],"status":"disputed","title":"** DISPUTED ** An issue was discovered in SMA Solar Technology products. A secondary...","description":"An issue was discovered in SMA Solar Technology products. A secondary authentication system is available for Installers called the Grid Guard system. This system uses predictable codes, and a single Grid Guard code can be used on any SMA inverter. Any such code, when combined with the installer account, allows changing very sensitive parameters. NOTE: the vendor reports that Grid Guard is not an authentication feature; it is only a tracing feature. Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01583,"percentile":0.75726,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284","CWE-863"],"published":"2017-08-05T17:00:00Z","modified":"2026-06-17T01:29:03Z","products":[{"vendor":"sma","product":"sunny_boy_1.5_firmware"},{"vendor":"sma","product":"sunny_boy_2.5_firmware"},{"vendor":"sma","product":"sunny_boy_3.0_firmware"},{"vendor":"sma","product":"sunny_boy_3.6_firmware"},{"vendor":"sma","product":"sunny_boy_3000tl_firmware"},{"vendor":"sma","product":"sunny_boy_3600_firmware"},{"vendor":"sma","product":"sunny_boy_3600tl_firmware"},{"vendor":"sma","product":"sunny_boy_4.0_firmware"},{"vendor":"sma","product":"sunny_boy_4000tl_firmware"},{"vendor":"sma","product":"sunny_boy_5.0_firmware"},{"vendor":"sma","product":"sunny_boy_5000_firmware"},{"vendor":"sma","product":"sunny_boy_5000tl_firmware"},{"vendor":"sma","product":"sunny_boy_storage_2.5_firmware"},{"vendor":"sma","product":"sunny_central_1000cp_xt_firmware"},{"vendor":"sma","product":"sunny_central_2200_firmware"},{"vendor":"sma","product":"sunny_central_500cp_xt_firmware"},{"vendor":"sma","product":"sunny_central_630cp_xt_firmware"},{"vendor":"sma","product":"sunny_central_720cp_xt_firmware"},{"vendor":"sma","product":"sunny_central_760cp_xt_firmware"},{"vendor":"sma","product":"sunny_central_800cp_xt_firmware"},{"vendor":"sma","product":"sunny_central_850cp_xt_firmware"},{"vendor":"sma","product":"sunny_central_900cp_xt_firmware"},{"vendor":"sma","product":"sunny_central_storage_1000_firmware"},{"vendor":"sma","product":"sunny_central_storage_2200_firmware"},{"vendor":"sma","product":"sunny_central_storage_2500-ev_firmware"},{"vendor":"sma","product":"sunny_central_storage_500_firmware"},{"vendor":"sma","product":"sunny_central_storage_630_firmware"},{"vendor":"sma","product":"sunny_central_storage_720_firmware"},{"vendor":"sma","product":"sunny_central_storage_760_firmware"},{"vendor":"sma","product":"sunny_central_storage_800_firmware"},{"vendor":"sma","product":"sunny_central_storage_850_firmware"},{"vendor":"sma","product":"sunny_central_storage_900_firmware"},{"vendor":"sma","product":"sunny_tripower_12000tl_firmware"},{"vendor":"sma","product":"sunny_tripower_15000tl_firmware"},{"vendor":"sma","product":"sunny_tripower_20000tl_firmware"},{"vendor":"sma","product":"sunny_tripower_25000tl_firmware"},{"vendor":"sma","product":"sunny_tripower_5000tl_firmware"},{"vendor":"sma","product":"sunny_tripower_60_firmware"},{"vendor":"sma","product":"sunny_tripower_core1_firmware"}],"references":[{"url":"http://www.sma.de/en/statement-on-cyber-security.html","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://horusscenario.com/CVE-information/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"http://www.sma.de/fileadmin/content/global/specials/documents/cyber-security/Whitepaper-Cyber-Security-AEN1732_07.pdf","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-9855"},{"url":"https://horusscenario.com/CVE-information"},{"url":"https://github.com/advisories/GHSA-v4m3-hw9h-pqgx"}],"sources":{"cve":[{"id":"CVE-2017-9855","description":"An issue was discovered in SMA Solar Technology products. A secondary authentication system is available for Installers called the Grid Guard system. This system uses predictable codes, and a single Grid Guard code can be used on any SMA inverter. Any such code, when combined with the installer account, allows changing very sensitive parameters. NOTE: the vendor reports that Grid Guard is not an authentication feature; it is only a tracing feature. Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected","status":"disputed","published":"2017-08-05T17:00:00Z","modified":"2024-10-29T13:57:15.277Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:33:13.606903Z"}],"euvd":[{"id":"EUVD-2017-18765","description":"An issue was discovered in SMA Solar Technology products. A secondary authentication system is available for Installers called the Grid Guard system. This system uses predictable codes, and a single Grid Guard code can be used on any SMA inverter. Any such code, when combined with the installer account, allows changing very sensitive parameters. NOTE: the vendor reports that Grid Guard is not an authentication feature; it is only a tracing feature. Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected","status":"published","published":"2017-08-05T17:00:00Z","modified":"2024-10-29T13:57:15Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:05:15.24326Z"}],"ghsa":[{"id":"GHSA-v4m3-hw9h-pqgx","title":"** DISPUTED ** An issue was discovered in SMA Solar Technology products. A secondary...","description":"** DISPUTED ** An issue was discovered in SMA Solar Technology products. A secondary authentication system is available for Installers called the Grid Guard system. This system uses predictable codes, and a single Grid Guard code can be used on any SMA inverter. Any such code, when combined with the installer account, allows changing very sensitive parameters. NOTE: the vendor reports that Grid Guard is not an authentication feature; it is only a tracing feature. Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected.","status":"published","published":"2022-05-13T01:48:12Z","modified":"2024-10-29T15:33:02Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-284","CWE-863"],"updated_at":"2026-11-02T14:58:38.070803Z"}],"nvd":[{"id":"CVE-2017-9855","description":"An issue was discovered in SMA Solar Technology products. A secondary authentication system is available for Installers called the Grid Guard system. This system uses predictable codes, and a single Grid Guard code can be used on any SMA inverter. Any such code, when combined with the installer account, allows changing very sensitive parameters. NOTE: the vendor reports that Grid Guard is not an authentication feature; it is only a tracing feature. Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected","status":"disputed","published":"2017-08-05T17:29:00.553Z","modified":"2026-06-17T01:29:03.15Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:03:57.282351Z"}]}}