What’s Vulnerable › Vulnerabilities

CVE-2017-9855

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-08-05 · updated 2026-06-17
• Weakness: CWE-863

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

Affected products

• SMA Sunny Boy 1.5 Firmware: all versions
• SMA Sunny Boy 2.5 Firmware: all versions
• SMA Sunny Boy 3.0 Firmware: all versions
• SMA Sunny Boy 3.6 Firmware: all versions
• SMA Sunny Boy 3000Tl Firmware: all versions
• SMA Sunny Boy 3600 Firmware: all versions
• SMA Sunny Boy 3600Tl Firmware: all versions
• SMA Sunny Boy 4.0 Firmware: all versions
• SMA Sunny Boy 4000Tl Firmware: all versions
• SMA Sunny Boy 5.0 Firmware: all versions
• SMA Sunny Boy 5000 Firmware: all versions
• SMA Sunny Boy 5000Tl Firmware: all versions
• SMA Sunny Boy Storage 2.5 Firmware: all versions
• SMA Sunny Central 1000Cp Xt Firmware: all versions
• SMA Sunny Central 2200 Firmware: all versions
• SMA Sunny Central 500Cp Xt Firmware: all versions
• SMA Sunny Central 630Cp Xt Firmware: all versions
• SMA Sunny Central 720Cp Xt Firmware: all versions
• SMA Sunny Central 760Cp Xt Firmware: all versions
• SMA Sunny Central 800Cp Xt Firmware: all versions
• SMA Sunny Central 850Cp Xt Firmware: all versions
• SMA Sunny Central 900Cp Xt Firmware: all versions
• SMA Sunny Central Storage 1000 Firmware: all versions
• SMA Sunny Central Storage 2200 Firmware: all versions
• SMA Sunny Central Storage 2500-Ev Firmware: all versions
• SMA Sunny Central Storage 500 Firmware: all versions
• SMA Sunny Central Storage 630 Firmware: all versions
• SMA Sunny Central Storage 720 Firmware: all versions
• SMA Sunny Central Storage 760 Firmware: all versions
• SMA Sunny Central Storage 800 Firmware: all versions

References

• http://www.sma.de/en/statement-on-cyber-security.html
• http://www.sma.de/fileadmin/content/global/specials/documents/cyber-security/Whitepaper-Cyber-Security-AEN1732_07.pdf
• https://horusscenario.com/CVE-information/
• http://www.sma.de/en/statement-on-cyber-security.html
• http://www.sma.de/fileadmin/content/global/specials/documents/cyber-security/Whitepaper-Cyber-Security-AEN1732_07.pdf
• https://horusscenario.com/CVE-information/

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