CVE-2025-55102
Published: 27 January 2026
Summary
CVE-2025-55102 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Eclipse Threadx Netx Duo. Its CVSS base score is 8.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 27.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SC-5 (Denial-of-service Protection) and SC-6 (Resource Availability).
Deeper analysis
CVE-2025-55102 is a denial-of-service vulnerability in the NetX IPv6 component of Eclipse ThreadX NetX Duo. The issue arises when a specially crafted IPv6 "Packet Too Big" ICMP message containing more than 15 different source addresses is processed, leading to a denial of service. It has a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) and is associated with CWEs 400 (Uncontrolled Resource Consumption), 404 (Improper Resource Shutdown or Release), 770 (Allocation of Resources Without Limits or Throttling), and NVD-CWE-noinfo.
An unauthenticated attacker with network access can exploit this vulnerability by sending a single malicious packet to a vulnerable device. Successful exploitation disrupts service availability on the target system without requiring privileges, user interaction, or special conditions, potentially causing resource exhaustion and halting network functionality.
The Eclipse ThreadX NetX Duo GitHub security advisory at https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-f3rx-xrwm-q2rf provides further details on the vulnerability, including recommended mitigations.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-206403
Vulnerability details
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…
more
send a malicious packet to trigger this vulnerability.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Single-packet resource exhaustion DoS via crafted ICMPv6 input directly matches application/system exploitation for endpoint denial of service.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly implements denial-of-service protections to block or mitigate resource exhaustion from specially crafted IPv6 ICMP 'Packet Too Big' packets with excessive source addresses.
Protects resource availability by enforcing allocation mechanisms and handling resource exhaustion, addressing uncontrolled consumption from processing more than 15 source addresses in a single packet.
Validates incoming information inputs, such as IPv6 ICMP packets, to reject malformed 'Packet Too Big' messages containing invalid multiple source addresses before processing.