CVE-2017-9857: SMA Sunny Boy 1.5 Firmware

High severity, CVSS 8.1. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in SMA Solar Technology products. The SMAdata2+ communication protocol does not properly use authentication with encryption: it is vulnerable to man in the middle, packet injection, and replay attacks. Any setting change, authentication packet, scouting packet, etc. can be replayed, injected, or used for a man in the middle session. All functionalities available in Sunny Explorer can effectively be done from anywhere within the network as long as an attacker gets the packet setup correctly. This includes the authentication process for all (including hidden) access levels and the changing of settings in accordance with the gained access rights. Furthermore, because the SMAdata2+ communication channel is unencrypted, an attacker capable of understanding the protocol can eavesdrop on communications. NOTE: the vendor's position is that authentication with encryption is not required on an isolated subnetwork. Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected

Affected products

SMA Sunny Boy 1.5 Firmware: affected versions not specified
SMA Sunny Boy 2.5 Firmware: affected versions not specified
SMA Sunny Boy 3.0 Firmware: affected versions not specified
SMA Sunny Boy 3.6 Firmware: affected versions not specified
SMA Sunny Boy 3000tl Firmware: affected versions not specified
SMA Sunny Boy 3600 Firmware: affected versions not specified
SMA Sunny Boy 3600tl Firmware: affected versions not specified
SMA Sunny Boy 4.0 Firmware: affected versions not specified
SMA Sunny Boy 4000tl Firmware: affected versions not specified
SMA Sunny Boy 5.0 Firmware: affected versions not specified
SMA Sunny Boy 5000 Firmware: affected versions not specified
SMA Sunny Boy 5000tl Firmware: affected versions not specified
SMA Sunny Boy Storage 2.5 Firmware: affected versions not specified
SMA Sunny Central 1000cp Xt Firmware: affected versions not specified
SMA Sunny Central 2200 Firmware: affected versions not specified
SMA Sunny Central 500cp Xt Firmware: affected versions not specified
SMA Sunny Central 630cp Xt Firmware: affected versions not specified
SMA Sunny Central 720cp Xt Firmware: affected versions not specified
SMA Sunny Central 760cp Xt Firmware: affected versions not specified
SMA Sunny Central 800cp Xt Firmware: affected versions not specified
SMA Sunny Central 850cp Xt Firmware: affected versions not specified
SMA Sunny Central 900cp Xt Firmware: affected versions not specified
SMA Sunny Central Storage 1000 Firmware: affected versions not specified
SMA Sunny Central Storage 2200 Firmware: affected versions not specified
SMA Sunny Central Storage 2500-Ev Firmware: affected versions not specified
and 14 more

Published 2017-08-05. Last modified 2026-06-17.