CVE-2021-20644
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 · uneditedELECOM WRC-1467GHBK-A allows arbitrary scripts to be executed on the user's web browser by displaying a specially crafted SSID on the web setup page.
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 confidenceThis is a stored Cross-Site Scripting (XSS) vulnerability in the ELECOM WRC-1467GHBK-A router's web setup page. An attacker can inject malicious JavaScript code into the wireless network name (SSID) field. When legitimate users access the router's configuration interface, the unsanitized SSID is rendered in the browser, causing the attacker's script to execute in the context of the user's session.
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 dataall versionsCVSS 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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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 router modelCheck the device label or web interface for the exact model number WRC-1467GHBK-AAffected if The device is an ELECOM WRC-1467GHBK-A router
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Confirm web interface accessAccess the router's web setup page by entering the router's IP address in a browser (typically 192.168.0.1 or 192.168.1.1)Affected if The router's web configuration interface is accessible
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Check wireless SSID configurationNavigate to the wireless settings page in the router admin panel and inspect the SSID fieldAffected if The SSID field exists and accepts input (all versions are affected)
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Verify SSID renderingView the wireless status or client list page where SSIDs are displayed and check if the SSID value is rendered without encodingAffected if The SSID is displayed in the browser without sanitization
If you are using an ELECOM WRC-1467GHBK-A router with its web interface accessible, you are affected since all firmware versions contain the vulnerability.
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 the router to the latest firmware version provided by ELECOM. If no patch is available, restrict access to the router's web interface and avoid viewing the setup page while unknown SSIDs are within range.
- Consultation4.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,392.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-20644 — 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-2021-20644 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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