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Rv110w FirmwareOperating system · Cisco

CVE-2018-0423

HIGH · 8.1 CVSS v3.0 Published 2018-10-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
90/100
Remediation priority · Urgent
Remotely reachable 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 vulnerability in the web-based management interface of the Cisco RV110W Wireless-N VPN Firewall, Cisco RV130W Wireless-N Multifunction VPN Router, and Cisco RV215W Wireless-N VPN Router could allow an unauthenticated, remote attacker to cause a denial of service condition or to execute arbitrary code. The vulnerability is due to improper boundary restrictions on user-supplied input in the Guest user feature of the web-based management interface. An attacker could exploit this vulnerability by sending malicious requests to a targeted device, triggering a buffer overflow condition. A successful exploit could allow the attacker to cause the device to stop responding, resulting in a denial of service condition, or could allow the attacker to execute arbitrary code.

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

Buffer overflow vulnerability in the web-based management interface of Cisco RV110W, RV130W, and RV215W routers. The Guest user feature lacks proper input validation, allowing unauthenticated remote attackers to send malicious requests that trigger overflow, leading to device DoS or arbitrary code execution.

MitigationApply Cisco's available firmware补丁 for the affected devices. As an interim measure, disable remote web-based management or restrict access to the management interface to trusted IP addresses only.

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
Rv110w FirmwareOperating system
Affected:all versions
Rv130w FirmwareOperating system
Affected:all versions
Rv215w FirmwareOperating system
Affected:all versions

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
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:H/PR:N/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
    Access the router web interface or check the physical device label to confirm the model number is RV110W, RV130W, or RV215W
    Affected if Device model is RV110W, RV130W, or RV215W
  2. Verify firmware version
    Log into the router web interface and navigate to Administration > Firmware Upgrade or Status page to view the installed firmware version
    Affected if Firmware version is any version (all versions of affected models are vulnerable)
  3. Confirm web-based management is enabled
    Check router settings under Administration > Remote Management or similar to see if the web-based management interface is enabled
    Affected if Web-based management interface is enabled on the device
  4. Check if remote access is permitted
    Examine the remote management settings to determine if the web interface is accessible from WAN/outside the local network
    Affected if Remote web-based management is accessible from WAN (untrusted networks)
  5. Verify Guest user feature status
    In the web interface, check if the Guest network or Guest user feature is configured and active under Wireless > Guest Network or similar
    Affected if Guest user feature is enabled and accessible

If the device is an RV110W, RV130W, or RV215W with web-based management enabled and accessible (especially remotely), and the Guest feature is active, the device is vulnerable to unauthenticated remote exploitation.

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 Cisco's available firmware补丁 for the affected devices. As an interim measure, disable remote web-based management or restrict access to the management interface to trusted IP addresses only.

Fix this in Rv110w Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,440
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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-2018-0423 in production — separate from our analysis above.

No notes yet

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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