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NULL Pointer DereferenceWeakness · CWE-476

CVE-2025-59668

HIGH · 7.5 CVSS v3.0 Published 2025-09-30
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
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
Multiple versions of Central Monitor CNS-6201 contain a NULL pointer dereference vulnerability. When processing a crafted certain UDP packet, the affected device may abnormally terminate.

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

Central Monitor CNS-6201 devices contain a NULL pointer dereference vulnerability in UDP packet processing. When receiving a specially crafted UDP packet, the device attempts to dereference a NULL pointer, causing an abnormal termination (denial of service). This is a memory corruption issue triggered by malformed network input.

MitigationImplement network segmentation and firewall rules to restrict UDP traffic to the CNS-6201 device from untrusted sources. Contact the vendor for patched firmware versions and apply any available updates.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

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

CVSS:3.0/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 checks

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

  1. Identify CNS-6201 device in your environment
    Review your asset inventory or physically locate network devices labeled Central Monitor CNS-6201. Check network scans for devices with this specific model identifier.
    Affected if A Central Monitor CNS-6201 device exists in the environment.
  2. Determine the firmware version
    Access the device management interface or check the firmware version through the device console or admin panel. Compare the installed version against any release notes from the vendor.
    Affected if The installed firmware version is unpatched or unknown.
  3. Identify exposed UDP services
    Run a network port scan targeting the CNS-6201 device to identify open UDP ports. Use tools such as nmap with -sU flag to enumerate UDP services.
    Affected if UDP ports are open and listening on the device.
  4. Verify UDP traffic accessibility
    Review firewall rules and network segmentation configurations to determine if the UDP services on the CNS-6201 can receive packets from untrusted network segments or the internet.
    Affected if UDP traffic from untrusted sources can reach the device.

You are affected if you have a CNS-6201 device with accessible UDP services that can receive packets from untrusted network sources.

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

Implement network segmentation and firewall rules to restrict UDP traffic to the CNS-6201 device from untrusted sources. Contact the vendor for patched firmware versions and apply any available updates.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
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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-2025-59668 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