CVE-2017-9856

LOW
3.4
CVSS Score
Published: August 5, 2017 at 05:00 PM UTC
Updated: June 17, 2026 at 01:29 AM UTC
82 products affected across 1 vendorSunny Central 760CP Xt FirmwareSunny Central 800CP Xt FirmwareSunny Boy 4.0 Firmware

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Severity
LOW3.4
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
sma-sunny-boy-2-5 (same device)
All versions
sma-sunny-boy-3000tl (same device)
All versions
sma-sunny-boy-3600 (same device)
All versions
sma-sunny-boy-3600tl (same device)
All versions
sma-sunny-boy-4000tl (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.4LOWCISA-ADP
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-256

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