Out-of-bounds reads in NetX Secure client-side handshake parsing (ServerHello and HelloVerifyRequest)
Priority LOW 34CWE-126Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
In Eclipse ThreadX NetX Duo versions 6.0 through 6.5.2.202603a, the NetX Secure TLS client's ServerHello parser and DTLS client's HelloVerifyRequest parser read fields before checking that the message is long enough to contain them. A malicious server or an on-path attacker can make the client read up to three bytes past a handshake message, which can fault the client on targets with memory protection.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00245 15th percentileScored 2026-11-07
Fix Fixed Eclipse ThreadX NetX Duo (Eclipse Foundation): 6.5.2.202603b
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse ThreadX NetX Duo | 6.0 – 6.5.2.202603a | 6.5.2.202603b | Patch available | CNA |
- Eclipse ThreadX NetX Duo VendorEclipse Foundation Affected 6.0 – 6.5.2.202603a Fixed in 6.5.2.202603b Patch available CNA
Remediation
- Fix · CNA Eclipse ThreadX NetX Duo (Eclipse Foundation) Fixed in 6.5.2.202603b
Timeline
- 2026-10-02 Threatist record created from CVE-2026-102728
- 2026-10-03 Alias added: GHSA-rqmh-m9w6-hv3m
- 2026-11-04 Title updated · CNA
- 2026-11-04 CVSS score added · CNA
- 2026-11-04 Fix available: Eclipse Foundation/Eclipse ThreadX NetX [email protected] · CNA
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Sources
- CVE-2026-102728 · CVE Program
- CVE-2026-102728 · NVD
- FIRST EPSS
- GHSA-rqmh-m9w6-hv3m · GitHub Advisory Database · CC BY 4.0
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