CVE-2020-25753Public exploitNetwork attack vector

Administrative access via publicly derived default password

Published Jun 16, 2021 · Updated Aug 4, 2024

Authentication weakness in Enphase Envoy R3.x and D4.x devices with v3 software allows remote attackers to gain administrative access. The web panel assigns the admin account a default password equal to the final six digits of the device serial number, while /info.xml discloses that serial number without authentication. Network access to the web interface is sufficient to derive the credential and authenticate with administrative privileges.

CVSS severity9.8
Critical
EPSS probability2.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication weakness in Enphase Envoy R3.x and D4.x devices with v3 software allows remote attackers to gain administrative access. The web panel assigns the admin account a default password equal to the final six digits of the device serial number, while /info.xml discloses that serial number without authentication. Network access to the web interface is sufficient to derive the credential and authenticate with administrative privileges.

The record

CVE
CVE-2020-25753
Published
Jun 16, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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

T1078.001Valid Accounts: Default 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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