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
References (3)
Core 3
Core References
Various Sources x_refsource_misc
http://www.sma.de/en/statement-on-cyber-security.html
Third Party Advisory x_refsource_misc
https://horusscenario.com/CVE-information/
Various Sources x_refsource_misc
http://www.sma.de/fileadmin/content/global/specials/documents/cyber-security/Whitepaper-Cyber-Security-AEN1732_07.pdf
Scores
CVSS v3
9.8
EPSS
0.0158
EPSS Percentile
72.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-863
Status
published
Products (39)
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_3000tl_firmware
sma/sunny_boy_3600_firmware
sma/sunny_boy_3600tl_firmware
sma/sunny_boy_4.0_firmware
sma/sunny_boy_4000tl_firmware
sma/sunny_boy_5.0_firmware
... and 29 more
Published
Aug 05, 2017
Tracked Since
Feb 18, 2026