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Evlink City Evc1s22p4 FirmwareOperating system · Schneider Electric

CVE-2021-22730

CRITICAL · 9.8 CVSS v3.1 Published 2021-07-21
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A CWE-798: Use of Hard-coded Credentials vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all versions prior to R8 V3.4.0.1), and EVlink Smart Wallbox (EVB1A all versions prior to R8 V3.4.0.1 ) that could an attacker to gain unauthorized administrative privileges when accessing to the charging station web server.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Hard-coded credentials are embedded in the web server of EVlink City, EVlink Parking, and EVlink Smart Wallbox charging stations. Attackers can use these credentials to gain unauthorized administrative access to the charging station web interfaces, bypassing authentication entirely.

MitigationUpdate all affected charging stations to firmware version R8 V3.4.0.1 or later, which removes the hard-coded credentials and implements proper authentication mechanisms.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Evlink City Evc1s22p4 FirmwareOperating system
Affected:< r8_v3.4.0.1
Evlink City Evc1s7p4 FirmwareOperating system
Affected:< r8_v3.4.0.1
Evlink Parking Evw2 FirmwareOperating system
Affected:< r8_v3.4.0.1
Evlink Parking Evf2 FirmwareOperating system
Affected:< r8_v3.4.0.1
Evlink Parking Ev.2 FirmwareOperating system
Affected:< r8_v3.4.0.1
Evlink Smart Wallbox Evb1a FirmwareOperating system
Affected:< r8_v3.4.0.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the charging station model
    Locate the product model label on the physical device or check the device configuration. Confirm it is one of: Evlink City Evc1s22p4, Evlink City Evc1s7p4, Evlink Parking Evw2, Evlink Parking Evf2, Evlink Parking Ev.2, or Evlink Smart Wallbox Evb1a
    Affected if The model matches any of the listed affected products and the firmware version is below r8_v3.4.0.1
  2. Check the installed firmware version
    Access the device web interface or use the vendor management tool to view the firmware version information. Compare the version string to r8_v3.4.0.1
    Affected if The firmware version begins with a number lower than r8_v3.4.0.1, or shows a version that does not start with r8_v3.4.0.1 or higher
  3. Verify web server accessibility
    Attempt to access the device web interface by entering the device IP address in a web browser. Check if the login page loads successfully
    Affected if The web interface is reachable on the network and displays a login prompt
  4. Test for hard-coded credential access
    Use the documented hard-coded credentials (if known) or attempt to access administrative functions without valid user credentials. Look for successful authentication bypass or unauthorized admin access
    Affected if Authentication can be bypassed or administrative access is gained without valid credentials, indicating the hard-coded credentials are present

The environment is affected if the charging station model is one of the listed products and the firmware version is below r8_v3.4.0.1, with the web interface accessible for exploitation.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update all affected charging stations to firmware version R8 V3.4.0.1 or later, which removes the hard-coded credentials and implements proper authentication mechanisms.

Recommended fix High confidence

r8_v3.4.0.1

  1. 1. Navigate to the Schneider Electric download portal at download.schneider-electric.com
  2. 2. Locate the firmware download section for your specific EVlink product model (EVC1S22P4, EVC1S7P4, EVW2, EVF2, EV.2, or EVB1A)
  3. 3. Download the firmware version r8_v3.4.0.1 or later for your device
  4. 4. Access the charging station's web interface using administrative credentials
  5. 5. Navigate to the firmware update or system settings section
  6. 6. Upload and apply the new firmware file
  7. 7. Verify the firmware installation was successful by checking the firmware version displayed in the web interface
  8. 8. Change any default administrative credentials immediately after the upgrade to further harden the device

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Evlink City Evc1s22p4 Firmware Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-22730 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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