CVE-2026-92843
8.7HighPublished 20 Oct 2026 · NVD status: Received · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Impact
- High impact on availability
- Weakness
- CWE-125
Impact
Remote unauthenticated attackers can crash services running NetX Secure by serving a malicious TLS 1.3 certificate message during the handshake. All they need is for your client or peer to connect to their server.
Root cause
A missing bounds check in the TLS 1.3 Certificate message parser triggers an unsigned integer underflow and a heap out-of-bounds read before certificate verification completes.
Affected systems
NetX Secure TLS 1.3 implementation; exact affected version numbers are not listed in the advisory.
CVSS v4.0 · 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Fix & remediation
Upgrade to the patched NetX Duo/NetX Secure release referenced in advisory GHSA-4m85-f9qh-q3jv. If upgrading immediately is not possible, disable TLS 1.3 or restrict outbound TLS connections to trusted endpoints.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
A missing bounds check in the TLS 1.3 Certificate-message parser of NetX Secure lets a malicious TLS 1.3 server trigger an unsigned-integer underflow and a subsequent heap out-of-bounds read in any peer that processes a remote Certificate message. It is reachable pre-authentication, during the normal handshake, before certificate verification completes.