CVE-2025-36747

Malicious firmware deployment via hard-coded FTP credentials

Published Dec 13, 2025 · Updated Dec 13, 2025

Hard-coded credentials in Growatt ShineLan-X 3.6.0.0 through 3.6.0.2 allow attackers to alter firmware distributed via FTP. The firmware embeds credentials for its FTP server and accepts replacement deployment files because firmware-signature verification is not enforced. Access to the FTP service is required; successful tampering can replace legitimate device firmware with attacker-controlled images.

CVSS severity9.4
Critical
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in Growatt ShineLan-X 3.6.0.0 through 3.6.0.2 allow attackers to alter firmware distributed via FTP. The firmware embeds credentials for its FTP server and accepts replacement deployment files because firmware-signature verification is not enforced. Access to the FTP service is required; successful tampering can replace legitimate device firmware with attacker-controlled images.

The record

CVE
CVE-2025-36747
Published
Dec 13, 2025
Updated
Dec 13, 2025
Vendor
Growatt
Product
ShineLan-X
Classifications
CWE-798, CAPEC-233, T1078
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.6.0.0 <=3.6.0.2

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Growatt · ShineLan-Xversion=3.6.0.0 <=3.6.0.2

Published CVSS scores

9.8National Institute of Standards and TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.4Dutch Institute for Vulnerability DisclosureCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
CAPEC-233Privilege Escalation
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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