A specially crafted communication packet sent to the affected device could cause a denial-of-service condition due to a deserialization vul…

published 2020-07-16 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4325

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.6%; EPSS 3.6% chance of exploitation in 30 days, percentile 89%
public exploits: 0; none known

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-170-02 updated 2020-06-18 cvss 7.5

Mitsubishi Electric MC Works64, MC Works32

Mitsubishi Electric MC Works32 Version 3.00A (aka Version 9.50.255.02) Mitsubishi Electric MC Works64 <= Version 4.02C (aka <= Version 10.95.208.31)
affected: mitigation “Mitsubishi Electric recommends updating to the latest software version or applying security patches.” mitsubishielectric.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

cisa ICSA-20-170-03 updated 2020-06-18 cvss 7.5

ICONICS GENESIS64, GENESIS32

ICONICS AnalytiX <= 10.96 ICONICS BizViz <= 9.5 ICONICS GENESIS32 <= 9.5 ICONICS GENESIS64 <= 10.96 ICONICS Hyper Historian <= 10.96 ICONICS MobileHMI <= 10.96
affected: mitigation “ICONICS is releasing a patch for v10.96, v10.95.5, and v10.95.2 of GENESIS64.” iconics.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

3.60% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

Mitsubishi Electric MC Works64
Mitsubishi Electric MC Works32
ICONICS GenBroker64, Platform Services, Workbench, FrameWorX Server
ICONICS GenBroker32

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

us-cert.cisa.gov /ics/advisories/icsa-20-170-02
third-party-advisory, us-government-resource
us-cert.cisa.gov /ics/advisories/icsa-20-170-03
third-party-advisory, us-government-resource

Sources

CVE List CVE-2020-12009
NVD CVE-2020-12009

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary