CVE-2024-8889
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 · uneditedVulnerability in CIRCUTOR TCP2RS+ firmware version 1.3b, which could allow an attacker to modify any configuration value, even if the device has the user/password authentication option enabled, without authentication by sending packets through the UDP protocol and port 2000, deconfiguring the device and thus disabling its use. This equipment is at the end of its useful life cycle.
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 confidenceCIRCUTOR TCP2RS+ firmware 1.3b contains an authentication bypass vulnerability in its UDP-based management interface on port 2000. Attackers can send specially crafted UDP packets to modify any configuration parameter without providing credentials, even when user/password authentication is explicitly enabled. This allows complete device reconfiguration and denial of service.
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= 1.3bCVSS 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
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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 checksWork through these to decide whether this CVE applies to you.
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Identify the device modelLocate the physical device or check network inventory for Circutor TCP2RS+ serial converters. Verify the model number matches 'TCP2RS+' or 'TCP2RS Plus'.Affected if The device is a Circutor TCP2RS+ unit.
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Check the installed firmware versionAccess the device management interface or check the firmware version through the device web UI, console, or SNMP if available. Look for a version string '1.3b'.Affected if The firmware version is exactly 1.3b.
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Verify UDP port 2000 is listeningRun a network scan against the device IP: 'nc -uz <device_ip> 2000' or use nmap: 'nmap -sU -p 2000 <device_ip>'. Check if the UDP port responds.Affected if UDP port 2000 is open and responsive on the device.
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Confirm authentication settingsCheck the device configuration to see if user/password authentication is enabled for the management interface. This can be verified through the web UI or configuration file if accessible.Affected if Authentication is explicitly enabled but can be bypassed via UDP packets.
You are affected if you have a Circutor TCP2RS+ device running firmware version 1.3b with UDP port 2000 exposed on your network, regardless of whether management authentication is 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 dataSince the device is end-of-life with no patch available, implement network isolation via firewall rules or VLAN segmentation to block unauthorized access to UDP port 2000; consider replacing with an actively supported device.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-8889 — 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-2024-8889 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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- 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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