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CVE-2017-9855

Published: Aug 5, 2017Updated: May 13, 2026 Sources: CVE List NVDNVD-CWE-noinfo
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
1.6%
Top 27.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfoCWE-863

Affected Products

sunny boy 3600 firmwaresmaICS / OT / IoT
sunny boy 5000 firmwaresmaICS / OT / IoT
sunny tripower core1 firmwaresmaICS / OT / IoT
sunny tripower 15000tl firmwaresmaICS / OT / IoT
sunny tripower 20000tl firmwaresmaICS / OT / IoT
smacommercialUSICS / OT / IoTaka sunny boy 1.5 firmware, sunny boy 2.5 firmware, sunny boy 3000tl firmware
and 35 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

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

Timeline

Published
Aug 5, 2017
Last Updated
May 13, 2026

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