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Ac2100 FirmwareOperating system · Netgear

CVE-2021-45511

CRITICAL · 9.8 CVSS v3.1 Published 2021-12-26
Fix available
A fix is available. Upgrade to 1.0.1.80 / 1.1.0.84 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges 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 authentication bypass. This affects AC2100 before 2021-08-27, AC2400 before 2021-08-27, AC2600 before 2021-08-27, D7000 before 2021-08-27, R6220 before 2021-08-27, R6230 before 2021-08-27, R6260 before 2021-08-27, R6330 before 2021-08-27, R6350 before 2021-08-27, R6700v2 before 2021-08-27, R6800 before 2021-08-27, R6850 before 2021-08-27, R6900v2 before 2021-08-27, R7200 before 2021-08-27, R7350 before 2021-08-27, R7400 before 2021-08-27, and R7450 before 2021-08-27.

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
Ac2100 FirmwareOperating system
Affected:< 1.2.0.88
Ac2400 FirmwareOperating system
Affected:< 1.2.0.88
Ac2600 FirmwareOperating system
Affected:< 1.2.0.88
D7000 FirmwareOperating system
Affected:< 1.0.1.80
R6220 FirmwareOperating system
Affected:< 1.1.0.110
R6230 FirmwareOperating system
Affected:< 1.1.0.110
R6260 FirmwareOperating system
Affected:< 1.1.0.84
R6330 FirmwareOperating system
Affected:< 1.1.0.84

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

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 1.0.1.80 / 1.1.0.84 / 1.1.0.110 or later
Fixed in 1.0.1.801.1.0.841.1.0.110
Vendor patch kb.netgear.com →
Recommended fix High confidence

Firmware 1.2.0.88 (AC2100/AC2400/AC2600), 1.0.1.80 (D7000), 1.1.0.110 (R6220/R6230), or 1.1.0.84 (R6260/R6330) - all dated 2021-08-27 or later

  1. 1. Identify the exact NETGEAR router model from the affected list (AC2100, AC2400, AC2600, D7000, R6220, R6230, R6260, or R6330)
  2. 2. Navigate to the NETGEAR support website at https://www.netgear.com/support/
  3. 3. Enter the router model number in the search box to find the product support page
  4. 4. Click on 'Downloads' or 'Firmware' section
  5. 5. Download the firmware version 1.2.0.88 for AC2100, AC2400, or AC2600 models
  6. 6. Download firmware version 1.0.1.80 for D7000 model
  7. 7. Download firmware version 1.1.0.110 for R6220 or R6230 models
  8. 8. Download firmware version 1.1.0.84 for R6260 or R6330 models
Caveat Firmware updates may briefly interrupt network connectivity; ensure stable power during upload

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-2021-45511 in production — separate from our analysis above.

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