Critical severity · published Oct 15, 2025
CVE-2025-55081
Potential out of bound read in _nx_secure_tls_process_clienthello()
9.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ND
NetX Duo · Eclipse Foundation
before 6.4.4 · source: vendor
TN
Threadx Netx Duo · Eclipse
before 6.4.4.202503 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-55081
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-55081
Vendor Advisory
https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-5vrv-8j5h-h6h6
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