CVE-2025-4534Public exploitNetwork attack vector

Sensitive device information exposure via unchanged defaults

Published May 11, 2025 · Updated May 12, 2025

Weak default-password enforcement in Sungrow Logger1000A/B P033 and earlier allows remote attackers to read sensitive device information. Affected firmware leaves factory credentials active without forcing users to replace them, including the maintain account password pw1111. Exposure requires a reachable web login and an unchanged default credential; successful access is limited to device-information disclosure.

CVSS severity6.3
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak default-password enforcement in Sungrow Logger1000A/B P033 and earlier allows remote attackers to read sensitive device information. Affected firmware leaves factory credentials active without forcing users to replace them, including the maintain account password pw1111. Exposure requires a reachable web login and an unchanged default credential; successful access is limited to device-information disclosure.

The record

CVE
CVE-2025-4534
Published
May 11, 2025
Updated
May 12, 2025
Vendor
Sungrow
Product
Logger1000
Classifications
CWE-521, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=01_A

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sungrow · Logger1000version=01_A

Published CVSS scores

2.6VulDBAV:N/AC:H/Au:N/C:P/I:N/A:N
3.7VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.7VulDBCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
6.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-521Weak Password Requirements
T1078.001Default Accounts

Public exploit references

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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