critical
9.8
CWE
863
Advisory Published
Updated

CVE-2017-9855

First published: Sat Aug 05 2017(Updated: )

** 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.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Sma Sunny Boy 3600 Firmware
Sma Sunny Boy 3600
Sma Sunny Boy 5000 Firmware
Sma Sunny Boy 5000
Sma Sunny Tripower Core1 Firmware
Sma Sunny Tripower Core1
Sma Sunny Tripower 15000tl Firmware
Sma Sunny Tripower 15000tl
Sma Sunny Tripower 20000tl Firmware
Sma Sunny Tripower 20000tl
Sma Sunny Tripower 25000tl Firmware
Sma Sunny Tripower 25000tl
Sma Sunny Tripower 5000tl Firmware
Sma Sunny Tripower 5000tl
Sma Sunny Tripower 12000tl Firmware
Sma Sunny Tripower 12000tl
Sma Sunny Tripower 60 Firmware
Sma Sunny Tripower 60
Sma Sunny Boy 3000tl Firmware
Sma Sunny Boy 3000tl
Sma Sunny Boy 3600tl Firmware
Sma Sunny Boy 3600tl
Sma Sunny Boy 4000tl Firmware
Sma Sunny Boy 4000tl
Sma Sunny Boy 5000tl Firmware
Sma Sunny Boy 5000tl
Sma Sunny Boy 1.5 Firmware
Sma Sunny Boy 1.5
Sma Sunny Boy 2.5 Firmware
Sma Sunny Boy 2.5
Sma Sunny Boy 3.0 Firmware
Sma Sunny Boy 3.0
Sma Sunny Boy 3.6 Firmware
Sma Sunny Boy 3.6
Sma Sunny Boy 4.0 Firmware
Sma Sunny Boy 4.0
Sma Sunny Boy 5.0 Firmware
Sma Sunny Boy 5.0
Sma Sunny Central 2200 Firmware
Sma Sunny Central 2200
Sma Sunny Central 1000cp Xt Firmware
Sma Sunny Central 1000cp Xt
Sma Sunny Central 800cp Xt Firmware
Sma Sunny Central 800cp Xt
Sma Sunny Central 850cp Xt Firmware
Sma Sunny Central 850cp Xt
Sma Sunny Central 900cp Xt Firmware
Sma Sunny Central 900cp Xt
Sma Sunny Central 500cp Xt Firmware
Sma Sunny Central 500cp Xt
Sma Sunny Central 630cp Xt Firmware
Sma Sunny Central 630cp Xt
Sma Sunny Central 720cp Xt Firmware
Sma Sunny Central 720cp Xt
Sma Sunny Central 760cp Xt Firmware
Sma Sunny Central 760cp Xt
Sma Sunny Central Storage 500 Firmware
Sma Sunny Central Storage 500
Sma Sunny Central Storage 630 Firmware
Sma Sunny Central Storage 630
Sma Sunny Central Storage 720 Firmware
Sma Sunny Central Storage 720
Sma Sunny Central Storage 760 Firmware
Sma Sunny Central Storage 760
Sma Sunny Central Storage 800 Firmware
Sma Sunny Central Storage 800
Sma Sunny Central Storage 850 Firmware
Sma Sunny Central Storage 850
Sma Sunny Central Storage 900 Firmware
Sma Sunny Central Storage 900
Sma Sunny Central Storage 1000 Firmware
Sma Sunny Central Storage 1000
Sma Sunny Central Storage 2200 Firmware
Sma Sunny Central Storage 2200
Sma Sunny Central Storage 2500-ev Firmware
Sma Sunny Central Storage 2500-ev
Sma Sunny Boy Storage 2.5 Firmware
Sma Sunny Boy Storage 2.5
All of
Sma Sunny Boy 3600 Firmware
Sma Sunny Boy 3600
All of
Sma Sunny Boy 5000 Firmware
Sma Sunny Boy 5000
All of
Sma Sunny Tripower Core1 Firmware
Sma Sunny Tripower Core1
All of
Sma Sunny Tripower 15000tl Firmware
Sma Sunny Tripower 15000tl
All of
Sma Sunny Tripower 20000tl Firmware
Sma Sunny Tripower 20000tl
All of
Sma Sunny Tripower 25000tl Firmware
Sma Sunny Tripower 25000tl
All of
Sma Sunny Tripower 5000tl Firmware
Sma Sunny Tripower 5000tl
All of
Sma Sunny Tripower 12000tl Firmware
Sma Sunny Tripower 12000tl
All of
Sma Sunny Tripower 60 Firmware
Sma Sunny Tripower 60
All of
Sma Sunny Boy 3000tl Firmware
Sma Sunny Boy 3000tl
All of
Sma Sunny Boy 3600tl Firmware
Sma Sunny Boy 3600tl
All of
Sma Sunny Boy 4000tl Firmware
Sma Sunny Boy 4000tl
All of
Sma Sunny Boy 5000tl Firmware
Sma Sunny Boy 5000tl
All of
Sma Sunny Boy 1.5 Firmware
Sma Sunny Boy 1.5
All of
Sma Sunny Boy 2.5 Firmware
Sma Sunny Boy 2.5
All of
Sma Sunny Boy 3.0 Firmware
Sma Sunny Boy 3.0
All of
Sma Sunny Boy 3.6 Firmware
Sma Sunny Boy 3.6
All of
Sma Sunny Boy 4.0 Firmware
Sma Sunny Boy 4.0
All of
Sma Sunny Boy 5.0 Firmware
Sma Sunny Boy 5.0
All of
Sma Sunny Central 2200 Firmware
Sma Sunny Central 2200
All of
Sma Sunny Central 1000cp Xt Firmware
Sma Sunny Central 1000cp Xt
All of
Sma Sunny Central 800cp Xt Firmware
Sma Sunny Central 800cp Xt
All of
Sma Sunny Central 850cp Xt Firmware
Sma Sunny Central 850cp Xt
All of
Sma Sunny Central 900cp Xt Firmware
Sma Sunny Central 900cp Xt
All of
Sma Sunny Central 500cp Xt Firmware
Sma Sunny Central 500cp Xt
All of
Sma Sunny Central 630cp Xt Firmware
Sma Sunny Central 630cp Xt
All of
Sma Sunny Central 720cp Xt Firmware
Sma Sunny Central 720cp Xt
All of
Sma Sunny Central 760cp Xt Firmware
Sma Sunny Central 760cp Xt
All of
Sma Sunny Central Storage 500 Firmware
Sma Sunny Central Storage 500
All of
Sma Sunny Central Storage 630 Firmware
Sma Sunny Central Storage 630
All of
Sma Sunny Central Storage 720 Firmware
Sma Sunny Central Storage 720
All of
Sma Sunny Central Storage 760 Firmware
Sma Sunny Central Storage 760
All of
Sma Sunny Central Storage 800 Firmware
Sma Sunny Central Storage 800
All of
Sma Sunny Central Storage 850 Firmware
Sma Sunny Central Storage 850
All of
Sma Sunny Central Storage 900 Firmware
Sma Sunny Central Storage 900
All of
Sma Sunny Central Storage 1000 Firmware
Sma Sunny Central Storage 1000
All of
Sma Sunny Central Storage 2200 Firmware
Sma Sunny Central Storage 2200
All of
Sma Sunny Central Storage 2500-ev Firmware
Sma Sunny Central Storage 2500-ev
All of
Sma Sunny Boy Storage 2.5 Firmware
Sma Sunny Boy Storage 2.5

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2017-9855?

    The severity of CVE-2017-9855 is considered to be medium due to the predictable codes used in the Grid Guard authentication system.

  • How do I fix CVE-2017-9855?

    To fix CVE-2017-9855, ensure that a unique and complex Grid Guard code is used and regularly updated for your SMA inverters.

  • Which SMA products are affected by CVE-2017-9855?

    CVE-2017-9855 affects various SMA products including the Sunny Boy and Sunny Tripower models that utilize the Grid Guard system.

  • What impact does CVE-2017-9855 have on SMA products?

    CVE-2017-9855 could allow an unauthorized user to bypass security mechanisms via predictable Grid Guard codes, potentially leading to system manipulation.

  • Is there a patch available for CVE-2017-9855?

    Currently, there is no official patch for CVE-2017-9855, but it is recommended to monitor SMA's security announcements for updates.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203