CVE intelligence and bounded remediation

CVE-2021-32976 — Moxa Nport Iaw5150A-6I/O Firmware security vulnerability

Critical CVSS 9.8

Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.

Severity
Critical
CVSS
9.8 (3.1)
Published
2022-04-01
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-121, CWE-787

Affected products

  • moxa / nport_iaw5150a-6i/o_firmware
  • moxa / nport_iaw5150a-12i/o_firmware
  • moxa / nport_iaw5250a-6i/o_firmware
  • moxa / nport_iaw5250a-12i/o_firmware

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
  • Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
  • Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

  • Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
  • Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
  • Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.