CVE-2024-8889Network attack vector

Unauthenticated configuration modification via UDP packets

Published Sep 18, 2024 · Updated Sep 18, 2024

Improper input validation in CIRCUTOR TCP2RS+ firmware 1.3b allows remote attackers to alter device configuration over UDP port 2000. The UDP configuration path accepts unauthenticated packets and applies attacker-supplied values even when setup authentication is enabled. Network reachability to UDP port 2000 is sufficient; changing arbitrary settings can deconfigure the gateway and interrupt its use.

CVSS severity9.3
Critical
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in CIRCUTOR TCP2RS+ firmware 1.3b allows remote attackers to alter device configuration over UDP port 2000. The UDP configuration path accepts unauthenticated packets and applies attacker-supplied values even when setup authentication is enabled. Network reachability to UDP port 2000 is sufficient; changing arbitrary settings can deconfigure the gateway and interrupt its use.

The record

CVE
CVE-2024-8889
Published
Sep 18, 2024
Updated
Sep 18, 2024
Vendor
CIRCUTOR
Product
TCP2RS+
Classifications
CWE-20, T0836
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.3b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CIRCUTOR · TCP2RS+version=1.3b

Published CVSS scores

9.3Spanish National Cybersecurity Institute, S.A. (INCIBE)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
9.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T0836Modify Parameter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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