CVE-2021-45603
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 disclosure of sensitive information. A UPnP request reveals a device's serial number, which can be used for a password reset. This affects D7800 before 1.0.1.66, EX2700 before 1.0.1.68, WN3000RPv2 before 1.0.0.90, WN3000RPv3 before 1.0.2.100, LBR1020 before 2.6.5.20, LBR20 before 2.6.5.32, R6700AX before 1.0.10.110, R7800 before 1.0.2.86, R8900 before 1.0.5.38, R9000 before 1.0.5.38, RAX10 before 1.0.10.110, RAX120v1 before 1.2.3.28, RAX120v2 before 1.2.3.28, RAX70 before 1.0.10.110, RAX78 before 1.0.10.110, XR450 before 2.3.2.130, XR500 before 2.3.2.130, and XR700 before 1.0.1.46.
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 analysisThe application discloses data — error detail, internal paths, tokens, or other users' records — to someone who shouldn't see it. On its own it can look minor, but it hands attackers the map they need for a larger attack. Remediation is about minimising what's returned and enforcing authorization on every piece of data.
General guidance for the information exposure 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< 1.0.1.66< 1.0.1.68< 1.0.0.90< 1.0.2.100< 2.6.5.20< 2.6.5.32< 1.0.10.110< 1.0.2.86CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 · scoped1.0.0.901.0.1.661.0.1.68
Upgrade to firmware version 1.0.1.66 (D7800), 1.0.1.68 (Ex2700), 1.0.0.90 (WN3000RPv2), 1.0.2.100 (WN3000RPv3), 2.6.5.20 (LBR1020), 2.6.5.32 (LBR20), 1.0.10.110 (R6700AX), or 1.0.2.86 (R7800) depending on device model
- 1. Identify the NETGEAR device model from the affected list (D7800, Ex2700, WN3000RPv2, WN3000RPv3, LBR1020, LBR20, R6700AX, R7800)
- 2. Access the device's web management interface using the device's IP address
- 3. Navigate to the Administration or Settings section, then look for Firmware Update or Router Update
- 4. Check the current firmware version under Router Status or System Info
- 5. Download the appropriate firmware version from the NETGEAR support website (support.netgear.com) for your specific model: D7800 to 1.0.1.66, Ex2700 to 1.0.1.68, WN3000RPv2 to 1.0.0.90, WN3000RPv3 to 1.0.2.100, LBR1020 to 2.6.5.20, LBR20 to 2.6.5.32, R6700AX to 1.0.10.110, R7800 to 1.0.2.86
- 6. In the firmware update page, select the downloaded firmware file and initiate the upgrade
- 7. Wait for the upgrade to complete and the device to reboot - do not power off the device during this process
- 8. After reboot, verify the new firmware version is installed and the UPnP vulnerability has been patched
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-2021-45603 — 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-2021-45603 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
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- Version or environment caveats, and links to real fixes
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