dbcve.org
D7800 FirmwareOperating system · Netgear

CVE-2021-45618

CRITICAL · 9.8 CVSS v3.1 Published 2021-12-26
Fix available
A fix is available. Upgrade to 1.0.0.134 / 1.0.0.216 or later.
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
Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects D7800 before 1.0.1.64, EX6200v2 before 1.0.1.86, EX6250 before 1.0.0.134, EX7700 before 1.0.0.216, EX8000 before 1.0.1.232, LBR20 before 2.6.3.50, R7800 before 1.0.2.80, R8900 before 1.0.5.26, R9000 before 1.0.5.26, RAX120 before 1.2.0.16, RBS50Y before 1.0.0.56, WNR2000v5 before 1.0.0.76, XR450 before 2.3.2.114, XR500 before 2.3.2.114, XR700 before 1.0.1.36, EX6150v2 before 1.0.1.98, EX7300 before 1.0.2.158, EX7320 before 1.0.0.134, EX6100v2 before 1.0.1.98, EX6400 before 1.0.2.158, EX7300v2 before 1.0.0.134, EX6410 before 1.0.0.134, RBR10 before 2.6.1.44, RBR20 before 2.6.2.104, RBR40 before 2.6.2.104, RBR50 before 2.7.2.102, EX6420 before 1.0.0.134, RBS10 before 2.6.1.44, RBS20 before 2.6.2.104, RBS40 before 2.6.2.104, RBS50 before 2.7.2.102, EX6400v2 before 1.0.0.134, RBK12 before 2.6.1.44, RBK20 before 2.6.2.104, RBK40 before 2.6.2.104, and RBK50 before 2.7.2.102.

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

This is a critical command injection vulnerability affecting numerous NETGEAR router and mesh system models. An unauthenticated remote attacker can execute arbitrary operating system commands on affected devices due to improper input validation. The vulnerability has a CVSS score of 9.8 (Critical) indicating ease of exploitation and severe impact.

MitigationUpdate affected NETGEAR devices to the firmware versions specified in the advisory (e.g., D7800 to 1.0.1.64, R7800 to 1.0.2.80, RAX120 to 1.2.0.16). If updates are unavailable, restrict network access to management interfaces and monitor for Indicators of Compromise.

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
D7800 FirmwareOperating system
Affected:< 1.0.1.64
Ex6200v2 FirmwareOperating system
Affected:< 1.0.1.86
Ex6250 FirmwareOperating system
Affected:< 1.0.0.134
Ex7700 FirmwareOperating system
Affected:< 1.0.0.216
Ex8000 FirmwareOperating system
Affected:< 1.0.1.232
Lbr20 FirmwareOperating system
Affected:< 2.6.3.50
R7800 FirmwareOperating system
Affected:< 1.0.2.80
R8900 FirmwareOperating system
Affected:< 1.0.5.26

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 your NETGEAR device model
    Check the product label on the device itself or log into the router web interface and locate the model number typically displayed on the main status page
    Affected if The model is one of: D7800, Ex6200v2, Ex6250, Ex7700, Ex8000, Lbr20, R7800, or R8900
  2. Locate the firmware version in the router web interface
    Log into the router admin panel (typically at 192.168.1.1) and navigate to Administration > Firmware Update or Advanced > Administration > Router Update. The current firmware version is displayed on the main status or dashboard page.
    Affected if A firmware version is displayed showing the installed build number
  3. Compare your firmware version against the affected ranges
    Check if your installed firmware version is lower than: D7800 < 1.0.1.64, Ex6200v2 < 1.0.1.86, Ex6250 < 1.0.0.134, Ex7700 < 1.0.0.216, Ex8000 < 1.0.1.232, Lbr20 < 2.6.3.50, R7800 < 1.0.2.80, R8900 < 1.0.5.26
    Affected if The installed version number is below the specified threshold for your model
  4. Verify remote management is enabled (optional context)
    In the router web interface, check Advanced > Remote Management or similar settings. The vulnerability is exploitable remotely if remote management is accessible from the WAN interface.
    Affected if Remote management is enabled and the device is directly exposed to the internet

You are affected if you own one of the listed NETGEAR models and your installed firmware version is below the minimum version number specified for that model.

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
Upgrade available Upgrade to 1.0.0.134 / 1.0.0.216 / 1.0.1.64 or later
Fixed in 1.0.0.1341.0.0.2161.0.1.64
Interim mitigation

Update affected NETGEAR devices to the firmware versions specified in the advisory (e.g., D7800 to 1.0.1.64, R7800 to 1.0.2.80, RAX120 to 1.2.0.16). If updates are unavailable, restrict network access to management interfaces and monitor for Indicators of Compromise.

Recommended fix High confidence

Device-specific firmware versions as listed above (e.g., D7800: 1.0.1.64, R7800: 1.0.2.80, etc.)

  1. Identify your NETGEAR device model from the affected product list
  2. Navigate to NETGEAR's support page (kb.netgear.com) or download center and locate the firmware download section for your specific device model
  3. Download the firmware file corresponding to or newer than the fixed version for your device: D7800 -> 1.0.1.64, Ex6200v2 -> 1.0.1.86, Ex6250 -> 1.0.0.134, Ex7700 -> 1.0.0.216, Ex8000 -> 1.0.1.232, Lbr20 -> 2.6.3.50, R7800 -> 1.0.2.80, R8900 -> 1.0.5.26, R9000 -> 1.0.5.26, RAX120 -> 1.2.0.16, RBS50Y -> 1.0.0.56, WNR2000v5 -> 1.0.0.76, XR450 -> 2.3.2.114, XR500 -> 2.3.2.114, XR700 -> 1.0.1.36, EX615
  4. Access your router's web management interface using an ethernet-connected device
  5. Locate the Firmware Update or Administration section in the router GUI
  6. Upload the downloaded firmware file and initiate the update process
  7. Wait for the firmware upload to complete and for the device to reboot automatically
  8. After reboot, verify the new firmware version is installed in the router settings
Caveat Firmware updates may temporarily disrupt network connectivity; some custom settings may reset to defaults and require reconfiguration

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

Fix this in D7800 Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2021-45618 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2021-45618 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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