9.3

CVE-2026-103416: eclipse foundation eclipse threadx - netx duo Out-of-bounds Write

CVSS: 9.3v4.0CriticalDeferred
Published 07-10-2026Last modified 07-10-2026
Open JSON

Vulnerability summary

CVE-2026-103416 is a critical (CVSS 9.3) Out-of-bounds Write vulnerability in eclipse foundation eclipse threadx - netx duo. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.3/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.21%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 07-10-2026
    PublishedVulnerability first disclosed.
  2. 07-10-2026
    Last modifiedVulnerability information updated.

Description

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 and on into the rest of the session control block, which holds pointers. A malicious or compromised server can make a TLS 1.3 client produce such a message before certificate authentication completes, so no server certificate is needed to reach it.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

07-10-202621-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Eclipse foundation1 product

1 vendor · 1 product

References

2 links