6.3
Medium
CVE-2026-102728 Out-of-bounds reads in NetX Secure client-side handshake parsing (ServerHello and HelloVerifyRequest)
Description
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.
CVSS 4.0 detail
Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NExploitable remotely over the network, without an account and without any user action; the impact on data or service is limited.
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- Present
- Privileges required
- None
- Interaction
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
- Confidentiality of other systems
- None
- Integrity of other systems
- None
- Availability of other systems
- None
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| NetX Duo 6.5 | earliest → 6.5.1.202602 | No fix stated |
| Eclipse ThreadX NetX Duo 6.5 | earliest → < 6.5.2.202603b | 6.5.2.202603b |
| Eclipse ThreadX NetX Duo 6.0 | 6.0 → 6.5.2.202603a | No fix stated |
Other CVEs of NetX Duo
The 32 CVEs of NetX Duo →
CVE-2026-106465
Missing HelloVerifyRequest cookie validation in the NetX Secure DTLS server
6.9
Medium
CVE-2026-106464
Out-of-bounds read via an empty signature BIT STRING in NetX Secure X.509 parsing
8.7
High
CVE-2026-103415
When a TLS 1.3 client processes a HelloRetryRequest, it copies the server's cookie into its second ClientHello without…
9.3
Critical
CVE-2026-102717
MQTT WebSocket setter ABI mismatch may disclose memory or cause a crash
7.5
High