CVE-2025-55081: eclipse foundation netx duo Buffer Over-read

Vulnerability summary

CVE-2025-55081 is a critical (CVSS 9.1) Buffer Over-read vulnerability in eclipse foundation netx duo. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.3% of scored vulnerabilities.

Timeline

1. 15-10-2025
   PublishedVulnerability first disclosed.
2. 15-10-2025
   Last modifiedVulnerability information updated.

Description

In Eclipse Foundation NextX Duo before 6.4.4, a module of ThreadX, the _nx_secure_tls_process_clienthello() function was missing length verification of certain SSL/TLS client hello message: the ciphersuite length and compression method length. In case of an attacker-crafted message with values outside of the expected range, it could cause an out-of-bound read.

• CWE-126Buffer Over-readThe product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.
• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.