CVE-2026-92853: high-severity vulnerability in Eclipse ThreadX - NetX Duo
Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.3%
The TLS 1.3 Certificate-message parser in NetX Secure decrements the message length to skip a context byte without first establishing that the message has a byte to skip. A zero-length Certificate message therefore wraps the unsigned length to `0xFFFFFFFF`, which makes the bounds check that follows vacuous and sends the parser reading past the session packet buffer.
The trigger is a four-byte handshake header and requires no cryptographic validity. It is reachable pre-authentication.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
Eclipse Foundation · Eclipse ThreadX - NetX DuoRelated CVEs — Eclipse ThreadX - NetX Duo
In the same product, most dangerous first.
CVE-2026-11576HIGHCVE-2026-11576EPSS 0.5%CVE-2025-55102HIGHCVE-2025-55102EPSS 0.4%CVE-2026-94018HIGHNetX Duo Web HTTP server releases an uninitialized packet pointer on the PUT Content-Length underflow pathEPSS 0.4%CVE-2026-93003MEDIUMNetX Duo Web HTTP server interprets request body content as HTTP header fieldsEPSS 0.3%CVE-2026-92843HIGHOut-of-bounds Read via the TLS 1.3 Certificate extensions_length in NetX SecureEPSS 0.3%CVE-2026-93475CRITICALOut-of-bounds Write via an Unbounded RSA Modulus in NetX Secure X.509EPSS 0.2%