CVE-2022-40620
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 · uneditedFunJSQ, a third-party module integrated on some NETGEAR routers and Orbi WiFi Systems, does not properly validate TLS certificates when downloading update packages through its auto-update mechanism. An attacker (suitably positioned on the network) could intercept the update request and deliver a malicious update package in order to gain arbitrary code execution on affected devices. This affects R6230 before 1.1.0.112, R6260 before 1.1.0.88, R7000 before 1.0.11.134, R8900 before 1.0.5.42, R9000 before 1.0.5.42, and XR300 before 1.0.3.72 and Orbi RBR20 before 2.7.2.26, RBR50 before 2.7.4.26, RBS20 before 2.7.2.26, and RBS50 before 2.7.4.26.
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 does not properly validate the TLS certificate presented by the other side — skipping the chain, the hostname, or expiry — so an attacker with a forged or mismatched certificate can sit in the middle of a supposedly secure connection. It is a common trap in custom clients and misconfigured libraries. The fix is full certificate validation, and never disabling verification to make errors go away.
General guidance for the improper certificate validation 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< 2.7.2.26< 1.1.0.112< 1.1.0.88< 1.0.11.134< 1.0.5.42< 1.0.5.42< 1.2.8.40< 1.2.8.40CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
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 · scoped1.0.5.421.0.11.1341.1.0.88
RBR20: 2.7.2.26; R6230: 1.1.0.112; R6260: 1.1.0.88; R7000: 1.0.11.134; R8900: 1.0.5.42; R9000: 1.0.5.42; RAX120: 1.2.8.40; RAX120v2: 1.2.8.40; XR300: 1.0.3.72; RBR50: 2.7.4.26; RBS20: 2.7.2.26; RBS50: 2.7.4.26
- Identify the exact NETGEAR router or Orbi model (e.g., R7000, RBR20).
- Go to the official NETGEAR support site (https://www.netgear.com/support/) and locate the firmware download page for that model.
- Check the latest available firmware version. Confirm it is equal to or higher than the fixed version for your model (RBR20: 2.7.2.26, R6230: 1.1.0.112, R6260: 1.1.0.88, R7000: 1.0.11.134, R8900: 1.0.5.42, R9000: 1.0.5.42, RAX120: 1.2.8.40, RAX120v2: 1.2.8.40, XR300: 1.0.3.72, RBR50: 2.7.4.26, RBS20: 2.7.2.26, RBS50: 2.7.4.26).
- Download the firmware file to a computer that can reach the router’s web UI.
- Connect the router to power and ensure stable power during the update.
- Open a web browser and log into the router’s admin interface (typically http://routerlogin.net or http://192.168.1.1).
- Navigate to the 'Administration' > 'Firmware Update' or 'Router Update' section.
- Click 'Browse', select the downloaded firmware file, then click 'Upload' or 'Update'.
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-2022-40620 — 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-2022-40620 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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