CVE-2026-94018
8.8HighPublished 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-457, CWE-824
Impact
Unauthenticated remote attackers can crash the service or corrupt memory by sending a single malformed HTTP PUT request. All they need is network access to the exposed HTTP server.
Root cause
The HTTP server dereferences and frees an uninitialized pointer when handling a Content-Length underflow during a PUT request.
Affected systems
Eclipse ThreadX NetX Duo (Web add-on HTTP server); specific versions 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:L/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
Check the vendor advisory (GHSA-wjxf-gjm5-jh5q) for patched source releases or block/filter inbound HTTP PUT requests to the device at the perimeter until updated firmware is deployed.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
The Web add-on's HTTP server dereferences and releases an uninitialized pointer when it detects a `Content-Length` underflow while processing a `PUT` request. The condition is reachable by an unauthenticated remote client with a single malformed request.