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D6100 FirmwareOperating system · Netgear

CVE-2019-20738

MEDIUM · 5.4 CVSS v3.1 Published 2020-04-16
Fix available
A fix is available. Upgrade to 1.0.0.30 / 1.0.0.58 or later.
See remediation →
58/100
Remediation priority · Elevated
Remotely reachable

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
Certain NETGEAR devices are affected by stored XSS. This affects D6100 before 1.0.0.58, D7800 before 1.0.1.34, JNR1010v2 before 1.1.0.50, JWNR2010v5 before 1.1.0.50, RBK50 before 2.3.5.30, RBR50 before 2.3.5.30, RBS50 before 2.3.5.30, R6020 before 1.0.0.30, R6080 before 1.0.0.30, R6100 before 1.0.1.16, R6120 before 1.0.0.40, R6700v2 before 1.2.0.14, R6800 before 1.2.0.14, R6900v2 before 1.2.0.14, R7500v2 before 1.0.3.26, R7800 before 1.0.2.46, R9000 before 1.0.4.2, WN3000RPv2 before 1.0.0.52, WN3000RPv3 before 1.0.2.78, WNDR3700v4 before 1.0.2.102, WNDR3700v5 before 1.1.0.54, WNDR4300v1 before 1.0.2.104, WNDR4300v2 before 1.0.0.48, WNDR4500v3 before 1.0.0.48, WNR1000v4 before 1.1.0.50, WNR2000v5 before 1.0.0.64, WNR2020 before 1.1.0.50, and WNR2050 before 1.1.0.50. NOTE: this may be a result of an incomplete fix for CVE-2017-18866.

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

Stored cross-site scripting (XSS) vulnerability in NETGEAR router web management interfaces. The vulnerability allows authenticated attackers to inject malicious JavaScript code through unsanitized input fields, which then executes in the browsers of other users viewing the affected pages. This appears to stem from incomplete remediation of CVE-2017-18866.

MitigationUpdate affected NETGEAR devices to the specified firmware versions that contain the complete fix. If updates are unavailable, restrict web management access to trusted networks or disable remote management.

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
D6100 FirmwareOperating system
Affected:< 1.0.0.58
D7800 FirmwareOperating system
Affected:< 1.0.1.34
Jnr1010 FirmwareOperating system
Affected:< 1.1.0.50
Jwnr2010 FirmwareOperating system
Affected:< 1.1.0.50
Rbk50 FirmwareOperating system
Affected:< 2.3.5.30
Rbr50 FirmwareOperating system
Affected:< 2.3.5.30
Rbs50 FirmwareOperating system
Affected:< 2.3.5.30
R6020 FirmwareOperating system
Affected:< 1.0.0.30

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
Low
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/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 checks

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

  1. Identify your NETGEAR device model
    Log into the router web management interface and navigate to the Status or Router Info page to find the model number, or physically inspect the device label
    Affected if the model matches one of the affected products: D6100, D7800, Jnr1010, Jwnr2010, Rbk50, Rbr50, Rbs50, or R6020
  2. Determine the installed firmware version
    In the web management interface, go to Administration > Firmware Update or Settings > Router Information to view the current firmware version
    Affected if the firmware version cannot be determined or is not visible in the interface
  3. Compare firmware against affected version ranges
    Match your installed firmware version to the following thresholds: D6100 < 1.0.0.58, D7800 < 1.0.1.34, Jnr1010 < 1.1.0.50, Jwnr2010 < 1.1.0.50, Rbk50/Rbr50/Rbs50 < 2.3.5.30, R6020 < 1.0.0.30
    Affected if your installed version is lower than the threshold for your specific model
  4. Verify if remote management or admin access is enabled
    In the web interface, check Advanced > Remote Management or Security settings to see if external admin access is permitted
    Affected if remote management is enabled and the device is exposed to untrusted networks
  5. Check for unsanitized input in web management fields
    As an authenticated admin, attempt to enter HTML or JavaScript characters (<script>, <img src=x onerror=>, etc.) in common fields like device name, SSID, or admin username; then view the page to see if the code executes
    Affected if the injected script characters render as raw HTML or execute rather than being sanitized or escaped

You are affected if you have a matching NETGEAR model running firmware below the specified version threshold AND you use the web management interface with any authenticated access.

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.

From vendor data
Upgrade available Upgrade to 1.0.0.30 / 1.0.0.58 / 1.0.1.34 or later
Fixed in 1.0.0.301.0.0.581.0.1.34
Interim mitigation

Update affected NETGEAR devices to the specified firmware versions that contain the complete fix. If updates are unavailable, restrict web management access to trusted networks or disable remote management.

Fix this in D6100 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation12.0 h
  • Testing8.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,880
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,808.

Scan for this in your stack

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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-2019-20738 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data