CVE-2025-55082Network attack vector

Unauthenticated memory disclosure via oversized TLS PSK identity

Published Oct 15, 2025 · Updated Oct 15, 2025

Out-of-bounds read in Eclipse ThreadX NetX Duo before 6.4.4 allows remote attackers to disclose adjacent memory via a TLS ClientHello. _nx_secure_tls_psk_identity_find() passes the attacker-controlled PSK identity length to memcmp() before verifying it against the stored identity size. Exploitation requires a TLS endpoint configured with pre-shared keys; repeated comparisons can reveal adjacent bytes and, when keys are contiguous, recover key material.

CVSS severity6.9
Medium
EPSS probability0.25%
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 disclose adjacent memory via a TLS ClientHello. _nx_secure_tls_psk_identity_find() passes the attacker-controlled PSK identity length to memcmp() before verifying it against the stored identity size. Exploitation requires a TLS endpoint configured with pre-shared keys; repeated comparisons can reveal adjacent bytes and, when keys are contiguous, recover key material.

The record

CVE
CVE-2025-55082
Published
Oct 15, 2025
Updated
Oct 15, 2025
Vendor
The Eclipse Foundation
Product
Eclipse ThreadX NetX Duo
Classifications
CWE-125, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 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

6.9Eclipse 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
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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