CVE-2021-45546
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 · uneditedCertain NETGEAR devices are affected by command injection by an authenticated user. This affects R7850 before 1.0.5.74, R7900P before 1.4.2.84, R7960P before 1.4.2.84, R8000 before 1.0.4.74, R8000P before 1.4.2.84, RAX200 before 1.0.4.120, RAX75 before 1.0.4.120, RAX80 before 1.0.4.120, RBK752 before 3.2.17.12, RBK852 before 3.2.17.12, RBR750 before 3.2.17.12, RBR850 before 3.2.17.12, RBS750 before 3.2.17.12, and RBS850 before 3.2.17.12.
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 analysisUser input reaches a command interpreter without being fully separated from the command itself, so an attacker can append instructions of their own. Because those run with the application's privileges, it frequently means control of the host. The lasting fix is to avoid constructing commands from input — call APIs directly and pass arguments as data, never as concatenated strings.
General guidance for the command injection 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< 1.0.5.74< 1.4.2.84< 1.4.2.84< 1.0.4.74< 1.4.2.84< 1.0.4.120< 1.0.4.120< 1.0.4.120CVSS 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 · scoped1.0.4.741.0.4.1201.0.5.74
R7850: 1.0.5.74 | R7900P: 1.4.2.84 | R7960P: 1.4.2.84 | R8000: 1.0.4.74 | R8000P: 1.4.2.84 | RAX200: 1.0.4.120 | RAX75: 1.0.4.120 | RAX80: 1.0.4.120 | RBK752/RBK852/RBR750/RBR850/RBS750/RBS850: 3.2.17.12
- 1. Identify your NETGEAR router model from the affected list (R7850, R7900P, R7960P, R8000, R8000P, RAX200, RAX75, RAX80, RBK752, RBK852, RBR750, RBR850, RBS750, RBS850)
- 2. Check your current firmware version in the router web interface under 'Administration' > 'Router Update' or 'Firmware Update'
- 3. Download the appropriate firmware for your model from the NETGEAR support website: https://www.netgear.com/support/
- 4. Access the router web interface using a browser connected to the router
- 5. Navigate to the firmware update section (typically under 'Administration' > 'Router Update')
- 6. Click 'Browse' and select the downloaded firmware file
- 7. Click 'Upload' to begin the firmware update
- 8. Wait for the upload to complete - do not power off the router during this process
Generated from the published advisory — verify against the referenced sources before acting.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-45546 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-45546 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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