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Nebula Fwa70 FirmwareOperating system · Zyxel

CVE-2026-1460

HIGH · 7.2 CVSS v3.1 Published 2026-04-28
Fix available
A fix is available. Upgrade to 1.15 / 1.16 or later.
See remediation →
78/100
Remediation priority · High
Remotely reachable 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 post-authentication command injection vulnerability in the “DomainName” parameter of the DHCP configuration file in Zyxel DX3301-T0 and EX3301-T0 firmware versions through 5.50(ABVY.7.1)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.

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 · high confidence

A post-authentication command injection vulnerability exists in the DomainName parameter of the DHCP configuration in Zyxel DX3301-T0 and EX3301-T0 firmware versions through 5.50(ABVY.7.1)C0. An authenticated attacker with administrator privileges can inject and execute arbitrary OS commands on the affected device through specially crafted input in this DHCP parameter.

MitigationApply vendor firmware patch when available; until then, restrict administrative interface access to trusted IPs only, enforce strong admin credentials, and monitor for unauthorized administrative sessions.

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
Nebula Fwa70 FirmwareOperating system
Affected:< 1.51\(acrf.0\)v0
Nebula Fwa505 FirmwareOperating system
Affected:< 1.60\(acko.3\)v0
Nebula Fwa510 FirmwareOperating system
Affected:< 1.60\(acgd.1\)v0
Nebula Fwa515 FirmwareOperating system
Affected:< 1.60\(acpz.1\)v0
Nebula Fwa710 FirmwareOperating system
Affected:< 1.60\(acgc.2\)v0
Nebula Lte3301 Plus FirmwareOperating system
Affected:< 1.18\(acca.7\)v0
Nebula Lte7461 M602 FirmwareOperating system
Affected:< 1.15\(acev.4\)v0
Nebula Nr5101 FirmwareOperating system
Affected:< 1.16\(accg.1\)v0

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

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/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 device model and firmware version
    Access the router web interface or CLI and retrieve the device model and exact firmware version from the status or system information page
    Affected if Device is Zyxel DX3301-T0 or EX3301-T0 with firmware version 5.50(ABVY.7.1)C0 or lower, OR device is one of the listed Nebula models with firmware below the specified version thresholds
  2. Verify administrator access status
    Check if you have valid administrator-level credentials to access the router configuration panel
    Affected if You possess active administrator credentials for the device
  3. Locate DHCP configuration settings
    Navigate to the DHCP server configuration section in the router web interface or CLI (typically under Network Settings or LAN configuration)
    Affected if DHCP configuration interface is accessible and the DomainName parameter can be modified
  4. Confirm DomainName parameter presence
    In the DHCP settings, identify the DomainName field where the command injection occurs
    Affected if The DomainName parameter exists in the DHCP configuration and accepts user input

You are affected if your Zyxel device matches one of the listed models AND runs firmware at or below the specified version threshold AND you have administrator access to modify DHCP settings.

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.

dbcve · scoped
Upgrade available Upgrade to 1.15 / 1.16 / 1.18 or later
Fixed in 1.151.161.18
Interim mitigation

Apply vendor firmware patch when available; until then, restrict administrative interface access to trusted IPs only, enforce strong admin credentials, and monitor for unauthorized administrative sessions.

Recommended fix Moderate confidence

Nebula Fwa70: 1.51(acrf.0)v0 | Nebula Fwa505: 1.60(acko.3)v0 | Nebula Fwa510: 1.60(acgd.1)v0 | Nebula Fwa515: 1.60(acpz.1)v0 | Nebula Fwa710: 1.60(acgc.2)v0 | Nebula Lte3301 Plus: 1.18(acca.7)v0 | Nebula Lte7461 M602: 1.15(acev.4)v0 | Nebula Nr5101: 1.16(accg.1)v0

  1. 1. Identify the specific Nebula device model from the affected list (Fwa70, Fwa505, Fwa510, Fwa515, Fwa710, Lte3301 Plus, Lte7461 M602, Nr5101)
  2. 2. Access the device's web management interface or Nebula cloud portal
  3. 3. Navigate to the firmware update or device management section
  4. 4. Check current firmware version under device settings
  5. 5. Download the appropriate fixed firmware from Zyxel's official support website (www.zyxel.com)
  6. 6. Upload and apply the firmware update to the device
  7. 7. Verify the firmware version after update confirms successful installation
Caveat Review Zyxel release notes for any configuration or feature changes between versions before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Nebula Fwa70 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,840
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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-2026-1460 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
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data