CVE-2026-103416Out-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 o…
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It affects Eclipse Foundation Eclipse ThreadX - NetX Duo. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.21%, higher than 10% of scored CVEs.
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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
- 9.3 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.21% (percentile 10)
- Assigned by
- eclipse
- NVD analysis
- Deferred
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Eclipse Foundation Eclipse ThreadX - NetX Duo eclipse_foundation:eclipse_threadx_netx_duo (from the name) | through 6.5.1.202602; 6.5.2.202603 not affected | CNA record |
References
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/356
- https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-4x76-j955-qhq2
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.