CVE-2017-9856

3.4 lowEPSS 0.7%

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

Severity

CVSS 3.1

3.4 low

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)
CWE: CWE-256
Published: 2017-08-05
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

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
sma:sunny_boy_5000_firmware
sma:sunny_boy_5000tl_firmware
sma:sunny_boy_storage_2.5_firmware
sma:sunny_central_1000cp_xt_firmware
sma:sunny_central_2200_firmware
sma:sunny_central_500cp_xt_firmware
sma:sunny_central_630cp_xt_firmware
sma:sunny_central_720cp_xt_firmware
sma:sunny_central_760cp_xt_firmware
sma:sunny_central_800cp_xt_firmware
sma:sunny_central_850cp_xt_firmware
sma:sunny_central_900cp_xt_firmware
sma:sunny_central_storage_1000_firmware
sma:sunny_central_storage_2200_firmware
sma:sunny_central_storage_2500-ev_firmware
sma:sunny_central_storage_500_firmware
sma:sunny_central_storage_630_firmware
sma:sunny_central_storage_720_firmware
sma:sunny_central_storage_760_firmware
sma:sunny_central_storage_800_firmware
sma:sunny_central_storage_850_firmware
sma:sunny_central_storage_900_firmware
sma:sunny_tripower_12000tl_firmware
sma:sunny_tripower_15000tl_firmware
sma:sunny_tripower_20000tl_firmware
sma:sunny_tripower_25000tl_firmware
sma:sunny_tripower_5000tl_firmware
sma:sunny_tripower_60_firmware
sma:sunny_tripower_core1_firmware

References

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