High severity · published Jan 27, 2026
CVE-2025-55102
A denial-of-service vulnerability exists in the NetX IPv6 component functionality of Eclipse ThreadX NetX Duo
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
A denial-of-service vulnerability exists in the NetX IPv6 component functionality of Eclipse ThreadX NetX Duo. A specially crafted network packet of "Packet Too Big" with more than 15 different source address can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ET
Eclipse ThreadX - NetX Duo · Eclipse Foundation
through 6.4.3 · source: vendor
TN
Threadx Netx Duo · Eclipse
before 6.4.5.202504 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-55102
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-55102
Vendor Advisory
https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-f3rx-xrwm-q2rf
More from Eclipse ThreadX - NetX Duo
9.3
CVE-2026-93475
Out-of-bounds Write via an Unbounded RSA Modulus in NetX Secure X.509
9.3
CVE-2026-103416
Out-of-bounds write via the TLS 1.3 handshake message cache in NetX Duo in Eclipse ThreadX NetX Duo 6.5.1.202602 allows a handshake message larger than the cache writes past it…
8.8
CVE-2026-94018
NetX Duo Web HTTP server releases an uninitialized packet pointer on the PUT Content-Length underflow path
8.7
CVE-2026-92843
Out-of-bounds Read via the TLS 1.3 Certificate extensions_length in NetX Secure
8.7
CVE-2026-92853
Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure