CVE-2024-23911Network attack vector

Unauthenticated device stoppage via undersized IPv6 NDP options

Published Apr 15, 2024 · Updated Aug 1, 2024

Out-of-bounds read in NXTech Cente IPv6 middleware allows remote attackers to stop embedded devices via crafted IPv6 NDP packets. The IPv6 NDP option parser accepts an option length shorter than the required data and reads memory beyond the received packet buffer. No authentication or user interaction is required; Cente IPv6 1.51 and earlier, Cente IPv6 SNMPv2 2.30 and earlier, and Cente IPv6 SNMPv3 2.30 and earlier can lose IPv6 communication or stop operating.

CVSS severity7.5
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in NXTech Cente IPv6 middleware allows remote attackers to stop embedded devices via crafted IPv6 NDP packets. The IPv6 NDP option parser accepts an option length shorter than the required data and reads memory beyond the received packet buffer. No authentication or user interaction is required; Cente IPv6 1.51 and earlier, Cente IPv6 SNMPv2 2.30 and earlier, and Cente IPv6 SNMPv3 2.30 and earlier can lose IPv6 communication or stop operating.

The record

CVE
CVE-2024-23911
Published
Apr 15, 2024
Updated
Aug 1, 2024
Vendor
NXTech Co., Ltd.
Product
Cente IPv6 SNMPv3
Classifications
CWE-125, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=0 <=2.30
  2. 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=0 <=2.30; version=Ver.2.30 and earlier
NXTech Co., Ltd. · Cente IPv6version=0 <=1.51; version=Ver.1.51 and earlier
NXTech Co., Ltd. · Cente IPv6 SNMPv2version=0 <=2.30; version=Ver.2.30 and earlier

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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

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-125Out-of-bounds Read
T1499Endpoint Denial of Service

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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