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Gs116e FirmwareOperating system · Netgear

CVE-2020-35224

MEDIUM · 6.5 CVSS v3.1 Published 2021-03-10
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
70/100
Remediation priority · Elevated
No privileges Zero-click

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 · unedited
A buffer overflow vulnerability in the NSDP protocol authentication method on NETGEAR JGS516PE/GS116Ev2 v2.6.0.43 devices allows remote unauthenticated attackers to force a device reboot.

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 confidence

Buffer overflow vulnerability in the NSDP (Netgear Switch Discovery Protocol) authentication method on NETGEAR JGS516PE and GS116Ev2 switches running firmware v2.6.0.43 allows remote unauthenticated attackers to send specially crafted packets that overflow a buffer, resulting in forced device reboot (denial of service).

MitigationApply vendor firmware updates when available; meanwhile, restrict network access to the affected switches and disable NSDP if the protocol is not essential for switch management.

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
Gs116e FirmwareOperating system
Affected:= 2.6.0.43
Jgs516pe FirmwareOperating system
Affected:= 2.6.0.43

CVSS 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
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:A/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the switch model
    Check the device label, web interface, or CLI output to confirm the model is either NETGEAR JGS516PE or GS116Ev2 (also marketed as GS116E).
    Affected if Device is not a JGS516PE or GS116Ev2 model.
  2. Check the installed firmware version
    Access the switch web interface (typically via HTTP/HTTPS) and navigate to the Administration or Maintenance section to view the firmware version. Alternatively, use the CLI command 'show version' or check the System Information page.
    Affected if Firmware version is NOT exactly 2.6.0.43.
  3. Verify NSDP protocol accessibility
    Confirm that UDP port 5353 (NSDP) is open and reachable on the switch. Use a network scanner or 'nc -u -z <switch_ip> 5353' from an adjacent host to test UDP port accessibility.
    Affected if NSDP port 5353 is not accessible from the network.

You are affected if your switch is a JGS516PE or GS116Ev2 running firmware version 2.6.0.43 AND the NSDP service on UDP port 5353 is accessible from your network.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply vendor firmware updates when available; meanwhile, restrict network access to the affected switches and disable NSDP if the protocol is not essential for switch management.

Fix this in Gs116e Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing6.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,420
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2020-35224 in production — separate from our analysis above.

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What this is

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.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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