CVE-2025-23406Network attack vector

Device crash via negative TCP MSS value

Published Feb 14, 2025 · Updated Feb 14, 2025

Out-of-bounds read in Cente TCP/IP Network Series products allows remote attackers to crash embedded devices with a crafted TCP packet. An invalid TCP MSS option can make the parsed MSS value negative, and later TCP transmission to that peer accesses an invalid memory address. No authentication or user action is required; affected releases are Cente TCP/IPv4 1.51 and earlier, Cente IPv6 1.60 and earlier, and the SNMPv2 and SNMPv3 products 2.30 and earlier.

CVSS severity5.3
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in Cente TCP/IP Network Series products allows remote attackers to crash embedded devices with a crafted TCP packet. An invalid TCP MSS option can make the parsed MSS value negative, and later TCP transmission to that peer accesses an invalid memory address. No authentication or user action is required; affected releases are Cente TCP/IPv4 1.51 and earlier, Cente IPv6 1.60 and earlier, and the SNMPv2 and SNMPv3 products 2.30 and earlier.

The record

CVE
CVE-2025-23406
Published
Feb 14, 2025
Updated
Feb 14, 2025
Vendor
NXTech Co., Ltd.
Product
Cente IPv6 SNMPv3
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=Ver.2.30 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NXTech Co., Ltd. · Cente IPv6 SNMPv3version=Ver.2.30 and earlier
NXTech Co., Ltd. · Cente IPv6version=Ver.1.60 and earlier
NXTech Co., Ltd. · Cente TCP/IPv4 SNMPv2version=Ver.2.30 and earlier
NXTech Co., Ltd. · Cente TCP/IPv4version=Ver.1.51 and earlier
NXTech Co., Ltd. · Cente TCP/IPv4 SNMPv3version=Ver.2.30 and earlier
NXTech Co., Ltd. · Cente IPv6 SNMPv2version=Ver.2.30 and earlier

Published CVSS scores

5.3JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo