CVE-2021-37562
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 · uneditedMediaTek microchips, as used in NETGEAR devices through 2021-11-11 and other devices, mishandle the WPS (Wi-Fi Protected Setup) protocol. (Affected Chipsets MT7603E, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915; Affected Software Versions 7.4.0.0; Out-of-bounds read).
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 analysis · moderate confidenceOut-of-bounds read vulnerability in the WPS (Wi-Fi Protected Setup) protocol implementation in MediaTek microchips (MT7603E, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915) running software version 7.4.0.0. This memory safety flaw during WPS handling could allow an attacker to read sensitive data from adjacent memory regions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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= 7.4.0.0= 7.4.0.0= 7.4.0.0= 7.4.0.0= 7.4.0.0= 7.4.0.0= 7.4.0.0= 7.4.0.0CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the Wi-Fi chipset in useExamine the device documentation, FCC labeling, or access the router admin interface to locate hardware or chipset information. For embedded devices, you may need to check /proc/cpuinfo or log into the device via SSH/Telnet if available.Affected if The device contains a MediaTek chip from the following list: MT7603E, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, or MT7915.
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Determine the firmware versionLog into the router or device admin panel (typically via web browser at 192.168.0.1 or 192.168.1.1) and navigate to the Status, System, or Firmware Upgrade page to view the installed firmware version. If CLI access is available, use commands such as 'cat /proc/version', 'ver', or 'show version' depending on the device OS.Affected if The firmware version is exactly 7.4.0.0.
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Verify WPS statusAccess the router admin interface and locate the WPS (Wi-Fi Protected Setup) settings, typically found under Wireless, Wi-Fi, or Security settings. Check whether WPS is currently enabled or disabled.Affected if WPS is enabled on the device. If WPS is disabled, the vulnerability cannot be exploited through WPS handling even if other conditions are met.
A device is affected if it uses one of the listed MediaTek chips, runs firmware version exactly 7.4.0.0, and has WPS enabled.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor dataApply vendor-supplied firmware updates from device manufacturers (e.g., NETGEAR) as they become available. If patches are unavailable, consider disabling WPS as a workaround to reduce attack surface.
- Consultation4.0 h
- Implementation2.0 h
- Testing8.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-37562 — 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-2021-37562 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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