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Ac2100 FirmwareOperating system · Netgear

CVE-2021-45644

CRITICAL · 9.8 CVSS v3.1 Published 2021-12-26
Fix available
A fix is available. Upgrade to 1.1.0.84 / 1.1.0.110 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 incorrect configuration of security settings. This affects AC2100 before 1.2.0.88, AC2400 before 1.2.0.88, AC2600 before 1.2.0.88, R6220 before 1.1.0.110, R6230 before 1.1.0.110, R6260 before 1.1.0.84, R6330 before 1.1.0.84, R6350 before 1.1.0.84, R6700v2 before 1.2.0.88, R6800 before 1.2.0.88, R6850 before 1.1.0.84, R6900v2 before 1.2.0.88, R7200 before 1.2.0.88, R7350 before 1.2.0.88, R7400 before 1.2.0.88, and R7450 before 1.2.0.88.

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
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
R6350 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 1.1.0.84 / 1.1.0.110 / 1.2.0.88 or later
Fixed in 1.1.0.841.1.0.1101.2.0.88
Vendor patch kb.netgear.com →
Recommended fix High confidence

Update to firmware version 1.2.0.88 (for AC2100/AC2400/AC2600/R6700v2/R6800/R6900v2/R7200/R7350/R7400/R7450), 1.1.0.110 (for R6220/R6230), or 1.1.0.84 (for R6260/R6330/R6350/R6850)

  1. 1. Identify your exact NETGEAR router model number
  2. 2. Visit the NETGEAR support website and download the latest firmware version for your specific model
  3. 3. Access the router's web management interface by navigating to routerlogin.net or routerlogin.com
  4. 4. Log in with your router administrator credentials
  5. 5. Navigate to Advanced > Administration > Firmware Update (or similar path depending on router model)
  6. 6. Select the option to manually upload the firmware file you downloaded
  7. 7. Wait for the firmware upload and installation to complete - do not power off the router during this process
  8. 8. After the router reboots, verify the firmware version has been updated in the router administration interface
Caveat Firmware updates may temporarily interrupt network connectivity; ensure stable power during the update process

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

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $2,300. Get the upgrade done

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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-2021-45644 in production — separate from our analysis above.

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What belongs here
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  • Version or environment caveats, and links to real fixes
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