CVE-2021-45610
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 a buffer overflow by an unauthenticated attacker. This affects D6220 before 1.0.0.66, D6400 before 1.0.0.100, D7000v2 before 1.0.0.66, D8500 before 1.0.3.58, DC112A before 1.0.0.52, DGN2200v4 before 1.0.0.118, EAX80 before 1.0.1.64, R6250 before 1.0.4.48, R7000 before 1.0.11.110, R7100LG before 1.0.0.72, R7900 before 1.0.4.30, R7960P before 1.4.1.64, R8000 before 1.0.4.62, RAX200 before 1.0.3.106, RS400 before 1.5.1.80, XR300 before 1.0.3.68, R6400v2 before 1.0.4.106, R7000P before 1.3.2.132, R8000P before 1.4.1.64, RAX20 before 1.0.2.82, RAX45 before 1.0.2.82, RAX80 before 1.0.3.106, R6700v3 before 1.0.4.106, R6900P before 1.3.2.132, R7900P before 1.4.1.64, RAX15 before 1.0.2.82, RAX50 before 1.0.2.82, 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 analysisA 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< 1.0.0.66< 1.0.0.100< 1.0.0.66< 1.0.3.58< 1.0.0.52< 1.0.0.118< 1.0.1.64< 1.0.4.48CVSS 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 · scoped1.0.0.521.0.0.661.0.0.100
Upgrade to the model‑specific fixed firmware version listed in NETGEAR advisory (e.g., D6220 to 1.0.0.66, R7000 to 1.0.11.110, etc.)
- Identify your NETGEAR router model number (e.g., D6220, R7000, etc.) from the device label or web UI.
- Check the currently installed firmware version via the router’s web administration page (usually under Administration > Firmware Update).
- Refer to the NETGEAR security advisory (KB000064487) to locate the fixed firmware version for your model (e.g., D6220 → 1.0.0.66, D6400 → 1.0.0.100, D7000v2 → 1.0.0.66, D8500 → 1.0.3.58, DC112A → 1.0.0.52, DGN2200v4 → 1.0.0.118, EAX80 → 1.0.1.64, R6250 → 1.0.4.48, R7000 → 1.0.11.110, R7100LG → 1.0.0.72, R7900 → 1.0.4.30, R7960P → 1.4.1.64, R8000 → 1.0.4.62, RAX200 → 1.0.3.106, RS400 → 1.5.1.80, XR
- Download the corresponding firmware file from the official NETGEAR support site (support.netgear.com) for your exact model.
- Log into the router’s web UI, navigate to Advanced > Administration > Firmware Update, and upload the downloaded firmware file.
- Allow the router to reboot automatically; do not power off or interrupt the update process.
- After the router restarts, log in again and verify the firmware version matches the fixed version listed in the advisory.
- Re‑apply any custom settings (e.g., Wi‑Fi SSIDs, port forwarding, VPN configuration) that may have been reset, or restore a previously saved configuration if the update reset the device.
Generated from the published advisory — verify against the referenced sources before acting.
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Free · runs locallyCheck whether your project pulls in CVE-2021-45610 — 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-2021-45610 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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