Is CVE-2017-9857 actively exploited?

No active exploitation of CVE-2017-9857 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-9857 be exploited remotely?

Yes. CVE-2017-9857 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2017-9857?

CVE-2017-9857 has a CVSS score of 8.1 (HIGH).

HOME VULNERABILITIESCVE-2017-9857

HIGH

CVE-2017-9857

CWE-287Published: August 5, 2017· Updated: Jun 17, 2026

8.1

CVSS v3.1

Official Description

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

NVD Source

Technical Analysis

CVE-2017-9857 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 8.1.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:H/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