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Fencer Vulns
high 7.5

CVE-2021-20601 json

Improper input validation vulnerability in GOT2000 series GT27 model all versions, GOT2000 series GT25 model all versions, GOT2000 series G…

published 2021-11-23 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8019

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

Improper input validation vulnerability in GOT2000 series GT27 model all versions, GOT2000 series GT25 model all versions, GOT2000 series GT23 model all versions, GOT2000 series GT21 model all versions, GOT SIMPLE series GS21 model all versions, and GT SoftGOT2000 all versions allows an remote unauthenticated attacker to write a value that exceeds the configured input range limit by sending a malicious packet to rewrite the device value. As a result, the system operation may be affected, such as malfunction.

Vendor advisories

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

cisa ICSA-21-320-02 updated cvss 7.5

Mitsubishi Electric GOT products

  • Mitsubishi Electric GS21 model Mitsubishi Electric GT SoftGOT2000 Mitsubishi Electric GT21 model Mitsubishi Electric GT23 model Mitsubishi Electric GT25 model Mitsubishi Electric GT27 model
    affected: mitigation “Mitsubishi Electric recommends users take measures such as installing a firewall to protect the GOT and system from unauthorized access from external equipment via the network.” 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

Exploit prediction

2.43% chance of exploitation in the next 30 days, higher than 84% 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:H/A:N
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:C/A:N

Affected products

  • n/a GOT2000 series GT27 model; GOT2000 series GT25 model; GOT2000 series GT23 model; GOT2000 series GT21 model; GOT SIMPLE series GS21 model; GT SoftGOT2000

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

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.