dbcve.org
R7000 FirmwareOperating system · Netgear

CVE-2021-45530

HIGH · 8.8 CVSS v3.1 Published 2021-12-26
Fix available
A fix is available. Upgrade to 1.0.2.82 / 1.0.4.74 or later.
See remediation →
94/100
Remediation priority · Urgent
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 a buffer overflow by an authenticated user. This affects R7000 before 1.0.11.126, R7960P before 1.4.2.84, R8000 before 1.0.4.74, RAX200 before 1.0.4.120, R8000P before 1.4.2.84, RAX20 before 1.0.2.82, RAX45 before 1.0.2.82, RAX80 before 1.0.4.120, R7900P before 1.4.2.84, RAX15 before 1.0.2.82, RAX50 before 1.0.2.82, and RAX75 before 1.0.4.120.

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
How this class of weakness works · CWE-120

A fixed-size buffer is filled without checking the length of the incoming data, so it overflows into neighbouring memory. This is the classic overflow attackers use to overwrite return addresses and hijack execution. The fix is strict length checks and safe, bounded string and memory functions.

General guidance for the classic buffer overflow class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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
R7000 FirmwareOperating system
Affected:< 1.0.11.126
R7000p FirmwareOperating system
Affected:< 1.4.2.84
R7960p FirmwareOperating system
Affected:< 1.4.2.84
R8000 FirmwareOperating system
Affected:< 1.0.4.74
R8000p FirmwareOperating system
Affected:< 1.4.2.84
Rax20 FirmwareOperating system
Affected:< 1.0.2.82
Rax200 FirmwareOperating system
Affected:< 1.0.4.120
Rax45 FirmwareOperating system
Affected:< 1.0.2.82

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
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/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 1.0.2.82 / 1.0.4.74 / 1.0.4.120 or later
Fixed in 1.0.2.821.0.4.741.0.4.120
Vendor patch kb.netgear.com →
Recommended fix High confidence

Model-specific firmware: R7000 >= 1.0.11.126, R7000p/R7960p/R8000p/R7900P >= 1.4.2.84, R8000 >= 1.0.4.74, Rax20/Rax45/RAX15/RAX50 >= 1.0.2.82, Rax200/RAX80/RAX75 >= 1.0.4.120

  1. 1. Identify your NETGEAR router model from the affected list (R7000, R7000p, R7960p, R8000, R8000p, Rax20, Rax200, Rax45, or additional affected models RAX80, R7900P, RAX15, RAX50, RAX75).
  2. 2. Navigate to the NETGEAR support website (support.netgear.com) and enter your router model number.
  3. 3. Locate the firmware download section for your specific model.
  4. 4. Download the firmware version equal to or newer than the fixed version for your model: R7000: 1.0.11.126, R7000p/R7960p/R8000p/R7900P: 1.4.2.84, R8000: 1.0.4.74, Rax20/Rax45/RAX15/RAX50: 1.0.2.82, Rax200/RAX80/RAX75: 1.0.4.120.
  5. 5. Access your router's web management interface by entering routerlogin.net or routerlogin.com in a browser.
  6. 6. Log in with your router administrator credentials.
  7. 7. Navigate to Advanced > Administration > Firmware Update (or similar path depending on model).
  8. 8. Select the downloaded firmware file and initiate the update.
Caveat Firmware updates may reset router configuration to defaults; backup current settings before upgrading if needed

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 $3,200. Get the upgrade done

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2021-45530 — 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-2021-45530 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