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D7800 FirmwareOperating system · Netgear

CVE-2021-45642

HIGH · 7.2 CVSS v3.1 Published 2021-12-26
Fix available
A fix is available. Upgrade to 1.0.0.134 / 1.0.0.222 or later.
See remediation →
78/100
Remediation priority · High
Remotely reachable Zero-click Patch available

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 incorrect configuration of security settings. This affects D7800 before 1.0.1.64, EX6250 before 1.0.0.134, EX7700 before 1.0.0.222, LBR20 before 2.6.3.50, RBS50Y before 2.7.3.22, R8900 before 1.0.5.26, R9000 before 1.0.5.26, XR450 before 2.3.2.66, XR500 before 2.3.2.66, XR700 before 1.0.1.36, EX7320 before 1.0.0.134, RAX120 before 1.2.2.24, EX7300v2 before 1.0.0.134, RAX120v2 before 1.2.2.24, EX6410 before 1.0.0.134, RBR10 before 2.7.3.22, RBR20 before 2.7.3.22, RBR40 before 2.7.3.22, RBR50 before 2.7.3.22, EX6420 before 1.0.0.134, RBS10 before 2.7.3.22, RBS20 before 2.7.3.22, RBS40 before 2.7.3.22, RBS50 before 2.7.3.22, EX6400v2 before 1.0.0.134, RBK12 before 2.7.3.22, RBK20 before 2.7.3.22, RBK40 before 2.7.3.22, and RBK50 before 2.7.3.22.

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

A detailed technical summary for this CVE is being prepared.

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
Ex6250 FirmwareOperating system
Affected:< 1.0.0.134
Ex7700 FirmwareOperating system
Affected:< 1.0.0.222
Lbr20 FirmwareOperating system
Affected:< 2.6.3.50
Rbs50y FirmwareOperating system
Affected:< 2.7.3.22
Rbs50 FirmwareOperating system
Affected:< 2.7.3.22
Rbs20 FirmwareOperating system
Affected:< 2.7.3.22
Rbs10 FirmwareOperating system
Affected:< 2.7.3.22

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
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

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 / 1.0.0.222 / 1.0.1.64 or later
Fixed in 1.0.0.1341.0.0.2221.0.1.64
Vendor patch kb.netgear.com →
Recommended fix High confidence

Upgrade to firmware version 1.0.1.64 (D7800), 1.0.0.134 (EX6250/EX7700), 2.6.3.50 (LBR20), or 2.7.3.22 (RBS50Y/RBS50/RBS20/RBS10) as specified in NETGEAR KB064491

  1. Identify your exact NETGEAR device model number (e.g., D7800, EX6250, RBS50)
  2. Check the current firmware version via the router/extender web interface or mobile app
  3. Visit the NETGEAR support website and navigate to the product page for your device model
  4. Download the appropriate firmware update: D7800 to version 1.0.1.64, EX6250 to version 1.0.0.134, EX7700 to version 1.0.0.222, LBR20 to version 2.6.3.50, RBS50Y/RBS50/RBS20/RBS10 to version 2.7.3.22
  5. Access the router/extender admin interface and navigate to the Firmware Update section
  6. Upload and apply the downloaded firmware file
  7. Allow the device to reboot completely and verify the new firmware version is installed
  8. If available, enable automatic firmware updates to receive future security patches
Caveat Firmware updates typically preserve settings, but backup configuration before upgrading; power interruption during update can brick device

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

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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

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Peer-ranked notes from engineers who’ve handled CVE-2021-45642 in production — separate from our analysis above.

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  • Version or environment caveats, and links to real fixes
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