CVE intelligence and bounded remediation

CVE-2020-12009 — Mitsubishielectric Mc Works security vulnerability

High CVSS 7.5

A specially crafted communication packet sent to the affected device could cause a denial-of-service condition due to a deserialization vulnerability. This affects: Mitsubishi Electric MC Works64 Version 4.02C (10.95.208.31) and earlier, all versions; Mitsubishi Electric MC Works32 Version 3.00A (9.50.255.02); ICONICS GenBroker64, Platform Services, Workbench, FrameWorX Server v10.96 and prior; ICONICS GenBroker32 v9.5 and prior.

Severity
High
CVSS
7.5 (3.1)
Published
2020-07-16
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-502

Affected products

  • mitsubishielectric / mc_works
  • mitsubishielectric / mc_works32 / 9.50.255.02
  • iconics / energy_analytix
  • iconics / facility_analytix
  • iconics / genesis64
  • iconics / hyper_historian

Showing 6 representative product identities from 11 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Unsafe deserialization and object reconstruction

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Check exposure

  • Inventory serialization formats accepted from requests, queues, caches, files, cookies, and cross-service messages.
  • Trace whether untrusted input can select classes, types, callbacks, constructors, or object hooks during decoding.
  • Identify signing, schema validation, trust-boundary, and compatibility settings for each decoder.

Remediate safely

  • Replace native object deserialization with a data-only format and explicit schema validation.
  • If replacement is not immediate, use a safe decoder with a minimal type allowlist and disable polymorphic or executable hooks.
  • Update the affected library and add inert tests for unknown types, extra fields, malformed nesting, and unsigned data.

Authoritative sources

Complete CVE record and remediation plan

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