CVE-2021-45673
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 stored XSS. This affects R7000 before 1.0.11.110, R7900 before 1.0.4.30, R8000 before 1.0.4.62, RAX200 before 1.0.3.106, R7000P before 1.3.3.140, RAX80 before 1.0.3.106, R6900P before 1.3.3.140, and RAX75 before 1.0.3.106.
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 analysisUntrusted input is placed into a web page without being neutralised, so an attacker's markup or script executes in another user's browser. That can hijack sessions, capture keystrokes, or silently perform actions as the victim. Fixing it properly means context-aware output encoding everywhere data meets HTML, backed by a content-security policy as a second line of defence.
General guidance for the cross-site scripting (xss) 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< 1.0.11.110< 1.0.4.30< 1.0.4.62< 1.0.3.106< 1.3.3.140< 1.0.3.106< 1.3.3.140< 1.0.3.106CVSS 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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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 · scoped1.0.3.1061.0.4.301.0.4.62
Upgrade to firmware version 1.0.11.110 or later for R7000; 1.0.4.30 or later for R7900; 1.0.4.62 or later for R8000; 1.0.3.106 or later for RAX200, RAX80, RAX75; 1.3.3.140 or later for R7000P, R6900P.
- 1. Identify your NETGEAR router model (e.g., R7000, R7900, R8000, RAX200, R7000P, RAX80, R6900P, RAX75).
- 2. Log in to the router’s web management interface and navigate to Administration > Router Update or Firmware Upgrade.
- 3. Check the current firmware version displayed and confirm it is earlier than the fixed release for your model (R7000 < 1.0.11.110, R7900 < 1.0.4.30, R8000 < 1.0.4.62, RAX200 < 1.0.3.106, R7000P < 1.3.3.140, RAX80 < 1.0.3.106, R6900P < 1.3.3.140, RAX75 < 1.0.3.106).
- 4. Download the latest firmware for your model from the NETGEAR support site (https://www.netgear.com/support/).
- 5. In the router’s firmware upgrade page, click Upload, select the downloaded firmware file, and start the update.
- 6. Allow the router to reboot automatically; do not power off during the flashing process.
- 7. After the router restarts, log in again and verify the firmware version now matches or exceeds the fixed release (e.g., 1.0.11.110 for R7000).
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-2021-45673 — 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-2021-45673 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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