CVE-2025-55093Network attack vector

Four-byte memory corruption via missing UDP bounds check

Published Oct 17, 2025 · Updated Oct 17, 2025

Buffer over-read in Eclipse ThreadX NetX Duo before 6.4.4 allows remote attackers to corrupt four memory bytes via a crafted IPv4 packet. During unicast DHCP handling with an interface address of zero, _nx_ipv4_packet_receive() removes the IP header and byte-swaps a presumed UDP header without checking that the payload contains one. An unauthenticated network sender needs only mark an empty IPv4 payload as UDP; the documented consequence is limited to four bytes of memory corruption.

CVSS severity6.9
Medium
EPSS probability0.29%
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

Buffer over-read in Eclipse ThreadX NetX Duo before 6.4.4 allows remote attackers to corrupt four memory bytes via a crafted IPv4 packet. During unicast DHCP handling with an interface address of zero, _nx_ipv4_packet_receive() removes the IP header and byte-swaps a presumed UDP header without checking that the payload contains one. An unauthenticated network sender needs only mark an empty IPv4 payload as UDP; the documented consequence is limited to four bytes of memory corruption.

The record

CVE
CVE-2025-55093
Published
Oct 17, 2025
Updated
Oct 17, 2025
Vendor
The Eclipse Foundation
Product
Eclipse ThreadX NetX Duo
Classifications
CWE-126, CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 17, 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=0 <6.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse ThreadX NetX Duoversion=0 <6.4.4

Published CVSS scores

5.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
6.9Eclipse FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

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-126Buffer Over-read
CWE-125Out-of-bounds Read

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