An issue was discovered in SMA Solar Technology products.
An issue was discovered in SMA Solar Technology products. All inverters have a very weak password policy for the user and installer password. No complexity requirements or length requirements are set. Also, strong passwords are impossible due to a maximum of 12 characters and a limited set of characters. NOTE: the vendor reports that the 12-character limit provides "a very high security standard." Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected
- Published
- Aug 5, 2017
- Updated
- Jun 16, 2026
- EPSS
- 1.7% · 77th percentile
- CWE
- CWE-521
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Report tools
Action score
40
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.7%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| sma | sunny boy 3600 firmware | cpe:2.3:o:sma:sunny_boy_3600_firmware |
| sma | sunny boy 3600 | cpe:2.3:h:sma:sunny_boy_3600 |
| sma | sunny boy 5000 firmware | cpe:2.3:o:sma:sunny_boy_5000_firmware |
| sma | sunny boy 5000 | cpe:2.3:h:sma:sunny_boy_5000 |
| sma | sunny tripower core1 firmware | cpe:2.3:o:sma:sunny_tripower_core1_firmware |
| sma | sunny tripower core1 | cpe:2.3:h:sma:sunny_tripower_core1 |
| sma | sunny tripower 15000tl firmware | cpe:2.3:o:sma:sunny_tripower_15000tl_firmware |
| sma | sunny tripower 15000tl | cpe:2.3:h:sma:sunny_tripower_15000tl |
| sma | sunny tripower 20000tl firmware | cpe:2.3:o:sma:sunny_tripower_20000tl_firmware |
| sma | sunny tripower 20000tl | cpe:2.3:h:sma:sunny_tripower_20000tl |
| sma | sunny tripower 25000tl firmware | cpe:2.3:o:sma:sunny_tripower_25000tl_firmware |
| sma | sunny tripower 25000tl | cpe:2.3:h:sma:sunny_tripower_25000tl |
and 66 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- sma sunny boy 1.5 firmwareall versions
- sma sunny boy 2.5 firmwareall versions
- sma sunny boy 3.0 firmwareall versions
- sma sunny boy 3.6 firmwareall versions
- sma sunny boy 3000tl firmwareall versions
- sma sunny boy 3600 firmwareall versions
- sma sunny boy 3600tl firmwareall versions
- sma sunny boy 4.0 firmwareall versions
- sma sunny boy 4000tl firmwareall versions
- sma sunny boy 5.0 firmwareall versions
- sma sunny boy 5000 firmwareall versions
- sma sunny boy 5000tl firmwareall versions
- sma sunny boy storage 2.5 firmwareall versions
- sma sunny central 1000cp xt firmwareall versions
- sma sunny central 2200 firmwareall versions
- sma sunny central 500cp xt firmwareall versions
- sma sunny central 630cp xt firmwareall versions
- sma sunny central 720cp xt firmwareall versions
- sma sunny central 760cp xt firmwareall versions
- sma sunny central 800cp xt firmwareall versions
Same product
sma: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-9860An issue was discovered in SMA Solar Technology products.40Plan
- CVE-2017-9852An Incorrect Password Management issue was discovered in SMA Solar Technology products.40Plan
- CVE-2017-9861An issue was discovered in SMA Solar Technology products.39Monitor
- CVE-2017-9859An issue was discovered in SMA Solar Technology products.39Monitor
- CVE-2017-9855An issue was discovered in SMA Solar Technology products.39Monitor
- CVE-2017-9854An issue was discovered in SMA Solar Technology products.39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-521 · Weak Password RequirementsCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Brute ForceCAPEC-112High
- Dictionary-based Password AttackCAPEC-16likelihood: Medium · High
- Password Brute ForcingCAPEC-49likelihood: Medium · High
- KerberoastingCAPEC-509High
- Rainbow Table Password CrackingCAPEC-55likelihood: Medium · Medium
- Remote Services with Stolen CredentialsCAPEC-555Very High
- Windows Admin Shares with Stolen CredentialsCAPEC-561
- Password SprayingCAPEC-565likelihood: High · High
ATT&CK techniques
- Remote ServicesT1021
- Remote Services:SMB/Windows Admin SharesT1021.002
- Valid Accounts:Default AccountsT1078.001
- Brute ForceT1110
- Brute Force:Password GuessingT1110.001
- Brute Force:Password CrackingT1110.002
- Brute Force:Password SprayingT1110.003
- Email Collection:Remote Email CollectionT1114.002
- External Remote ServicesT1133
- Steal or Forge Kerberos Tickets:KerberoastingT1558.003
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.sma.de/en/statement-on-cyber-security.html
- www.sma.de/fileadmin/content/global/specials/documents/cyber-security/Whitepaper-Cyber-Security-AEN1732_07.pdf
- horusscenario.com/CVE-information/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.