CVE-2026-92853GHSA-893m-9g4r-4992
Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure
Eclipse Foundation Eclipse ThreadX - NetX Duo
CVSS
8.7HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.30%Chance of exploitation activity in the next 30 days, higher than 21% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
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.
Text from CVE List
Affected versions 2
- Eclipse ThreadX - NetX Duoaffected: all versions through 6.5.1.202602CVE List
- Eclipse ThreadX - NetX Duounaffected: 6.5.2.202603CVE List