{"id":"CVE-2017-9855","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-9855","generatedAt":"2026-10-28T21:17:24.226Z","title":"Any such code, when combined with the installer account, allows changing very sensitive parameters.","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","published":"2017-08-05T17:29:01.000Z","lastModified":"2026-06-17T01:29:03.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-863"],"affected":["sma/sunny boy 3600 firmware","sma/sunny boy 5000 firmware","sma/sunny tripower core1 firmware","sma/sunny tripower 15000tl firmware","sma/sunny tripower 20000tl firmware","sma/sunny tripower 25000tl firmware","sma/sunny tripower 5000tl firmware","sma/sunny tripower 12000tl firmware","sma/sunny tripower 60 firmware","sma/sunny boy 3000tl firmware","sma/sunny boy 3600tl firmware","sma/sunny boy 4000tl firmware","sma/sunny boy 5000tl firmware","sma/sunny boy 1.5 firmware","sma/sunny boy 2.5 firmware","sma/sunny boy 3.0 firmware","sma/sunny boy 3.6 firmware","sma/sunny boy 4.0 firmware","sma/sunny boy 5.0 firmware","sma/sunny central 2200 firmware","sma/sunny central 1000cp xt firmware","sma/sunny central 800cp xt firmware","sma/sunny central 850cp xt firmware","sma/sunny central 900cp xt firmware","sma/sunny central 500cp xt firmware","sma/sunny central 630cp xt firmware","sma/sunny central 720cp xt firmware","sma/sunny central 760cp xt firmware","sma/sunny central storage 500 firmware","sma/sunny central storage 630 firmware","sma/sunny central storage 720 firmware","sma/sunny central storage 760 firmware","sma/sunny central storage 800 firmware","sma/sunny central storage 850 firmware","sma/sunny central storage 900 firmware","sma/sunny central storage 1000 firmware","sma/sunny central storage 2200 firmware","sma/sunny central storage 2500-ev firmware","sma/sunny boy storage 2.5 firmware"],"epss":{"score":0.01583,"percentile":0.75426,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.sma.de/en/statement-on-cyber-security.html","source":"cve@mitre.org"},{"url":"http://www.sma.de/fileadmin/content/global/specials/documents/cyber-security/Whitepaper-Cyber-Security-AEN1732_07.pdf","source":"cve@mitre.org"},{"url":"https://horusscenario.com/CVE-information/","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.sma.de/en/statement-on-cyber-security.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.sma.de/fileadmin/content/global/specials/documents/cyber-security/Whitepaper-Cyber-Security-AEN1732_07.pdf","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://horusscenario.com/CVE-information/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-9855","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}