CVE-2025-55091Network attack vector

Out-of-bounds read via unchecked empty IP payload

Published Oct 16, 2025 · Updated Oct 16, 2025

Out-of-bounds read in Eclipse ThreadX NetX Duo before 6.4.4 allows remote attackers to read memory via an empty IP payload. _nx_ip_packet_receive() dereferences nx_packet_prepend_ptr to select IPv4 or IPv6 before verifying that an IP header is present. Exploitation requires an Ethernet frame classified as IP with zero IP-data bytes; the vendor identifies adjacent-memory disclosure or a crash as possible consequences.

CVSS severity6.9
Medium
EPSS probability0.37%
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 Eclipse ThreadX NetX Duo before 6.4.4 allows remote attackers to read memory via an empty IP payload. _nx_ip_packet_receive() dereferences nx_packet_prepend_ptr to select IPv4 or IPv6 before verifying that an IP header is present. Exploitation requires an Ethernet frame classified as IP with zero IP-data bytes; the vendor identifies adjacent-memory disclosure or a crash as possible consequences.

The record

CVE
CVE-2025-55091
Published
Oct 16, 2025
Updated
Oct 16, 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 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 16, 2025Record 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 <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

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
6.9Eclipse FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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 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-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

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Your stack

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