What is CVE-2017-9856?

CVE-2017-9856 is a low-severity vulnerability in Sma Sunny Boy 1.5, classified under Plaintext Storage of a Password. CVSS score: 3.4/10. Published 2017-08-05.

How severe is CVE-2017-9856?

Low severity. CVSS v3 base score is 3.4 out of 10.

Vulnerability in Sma Sunny Boy 1.5

CVE-2017-9856

An issue was discovered in SMA Solar Technology products. Sniffed passwords from SMAdata2+ communication can be decrypted very easily. The passwords are "encrypted" using a very simple encryption algorithm. This enables an attacker to find the plaintext passwords and authenticate to the device. NOTE: the vendor reports that only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected

Published 2017-08-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.4 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (49.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-256 — Plaintext Storage of a Password

References

Frequently asked questions

What is CVE-2017-9856?: CVE-2017-9856 is a low-severity vulnerability in Sma Sunny Boy 1.5, classified under Plaintext Storage of a Password. CVSS score: 3.4/10. Published 2017-08-05.
How severe is CVE-2017-9856?: Low severity. CVSS v3 base score is 3.4 out of 10.