CVE-2021-22773
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 · uneditedA CWE-620: Unverified Password Change 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 allow an attacker connected to the charging station web server to modify the password of a user.
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 confidenceAn Unverified Password Change vulnerability (CWE-620) in the web server of EVlink City, EVlink Parking, and EVlink Smart Wallbox charging stations allows an authenticated or network-adjacent attacker to modify user passwords without proper verification, potentially gaining unauthorized access to the charging station management interface.
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< r8_v3.4.0.1< r8_v3.4.0.1< r8_v3.4.0.1< r8_v3.4.0.1< r8_v3.4.0.1< r8_v3.4.0.1CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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 checksWork through these to decide whether this CVE applies to you.
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Identify the EVlink modelLocate the charging station model number on the physical device or in the management interface - look for Evc1s22p4, Evc1s7p4, Evw2, Evf2, Ev.2, or Evb1a designationsAffected if The model matches one of the affected products: Evlink City Evc1s22p4, Evlink City Evc1s7p4, Evlink Parking Evw2, Evlink Parking Evf2, Evlink Parking Ev.2, or Evlink Smart Wallbox Evb1a
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Check the installed firmware versionAccess the charging station web interface or administrative panel and locate the firmware version information, typically found in Settings, About, or System Information sectionsAffected if The firmware version is earlier than r8_v3.4.0.1 (for example, r8_v3.3.x or any version with a lower build number)
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Determine if the web server is accessibleAttempt to access the charging station web interface over the network using HTTP/HTTPS to confirm the web server is reachableAffected if The web interface is exposed and accessible from the network (authenticated or network-adjacent attackers require this access to exploit the vulnerability)
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Review access logs for password change operationsCheck the charging station or associated management system logs for any password modification requests, focusing on operations that lack proper verification patternsAffected if Logs show password changes that were initiated without proper user verification or that originated from unexpected sources
You are affected if you own any of the listed EVlink models and your firmware version is earlier than r8_v3.4.0.1, with the web interface accessible to authenticated or network-adjacent attackers.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor dataUpdate affected charging station firmware to R8 V3.4.0.1 or later to obtain the vendor patch. Until then, restrict network access to the charging station web interfaces and monitor for unauthorized password change attempts.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22773 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-22773 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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