HOMEVULNERABILITIESCVE-2017-9855
CRITICAL

CVE-2017-9855

NVD-CWE-noinfoPublished: August 5, 2017· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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

NVD Source

Technical Analysis

CVE-2017-9855 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

sma78 product(s)
sunny boy 3600 firmwaresunny boy 3600sunny boy 5000 firmwaresunny boy 5000sunny tripower core1 firmwaresunny tripower core1sunny tripower 15000tl firmwaresunny tripower 15000tlsunny tripower 20000tl firmwaresunny tripower 20000tlsunny tripower 25000tl firmwaresunny tripower 25000tl+66
Source: NVD CPE · 78 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://horusscenario.com/CVE-information/
ADVISORYhttps://horusscenario.com/CVE-information/

All References (6)

→
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/Third Party Advisory
→
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/Third Party Advisory

Quick Facts

CVE IDCVE-2017-9855
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedAug 5, 2017

Related CVEs (NVD-CWE-noinfo)

CVE-2013-2330
10.0
CVE-2013-2325
10.0
CVE-2013-2720
10.0
CVE-2013-2329
10.0
CVE-2013-2324
10.0
CVE-2013-2326
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-9855 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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