CVE-2021-20601

highpriority · track · 31EPSS 0.024 · 84 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.43% (84th) EPSS

CVSS 7.8 · high

Is it mine?

63 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationGS21 modelcisa_csaf_ot
Install antivirus software on user computers with access to the product and the system.
MitigationGT SoftGOT2000cisa_csaf_ot
Install antivirus software on user computers with access to the product and the system.
MitigationGT21 modelcisa_csaf_ot
Install antivirus software on user computers with access to the product and the system.
MitigationGT23 modelcisa_csaf_ot
Install antivirus software on user computers with access to the product and the system.
MitigationGT25 modelcisa_csaf_ot
Install antivirus software on user computers with access to the product and the system.
MitigationGT27 modelcisa_csaf_ot
Install antivirus software on user computers with access to the product and the system.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:C/A:Nprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · CISA US

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20US

affected products (63)

Products and version ranges known to be affected.

GS21 model: All versionsall versionscisa_csaf_otUS
GT SoftGOT2000: All versionsall versionscisa_csaf_otUS
GT21 model: All versionsall versionscisa_csaf_otUS
GT23 model: All versionsall versionscisa_csaf_otUS
GT25 model: All versionsall versionscisa_csaf_otUS
GT27 model: All versionsall versionscisa_csaf_otUS
Mitsubishi Electric GS21 modelall versionscisa_csaf_otUS
Mitsubishi Electric GT SoftGOT2000all versionscisa_csaf_otUS
Mitsubishi Electric GT21 modelall versionscisa_csaf_otUS
Mitsubishi Electric GT23 modelall versionscisa_csaf_otUS
Mitsubishi Electric GT25 modelall versionscisa_csaf_otUS
Mitsubishi Electric GT27 modelall versionscisa_csaf_otUS
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≤ All versionsenisa_euvdEU
mitsubishielectric got simple gs2107-wtbd firmwareall versionsnvdUScpe:2.3:o:mitsubishielectric:got_simple_gs2107-wtbd_firmware:*:*:*:*:*:*:*:*
mitsubishielectric got simple gs2110-wtbd firmwareall versionsnvdUScpe:2.3:o:mitsubishielectric:got_simple_gs2110-wtbd_firmware:*:*:*:*:*:*:*:*
mitsubishielectric got2000 gt2103-pmbd firmwareall versionsnvdUScpe:2.3:o:mitsubishielectric:got2000_gt2103-pmbd_firmware:*:*:*:*:*:*:*:*
mitsubishielectric got2000 gt2103-pmbds firmwareall versionsnvdUScpe:2.3:o:mitsubishielectric:got2000_gt2103-pmbds_firmware:*:*:*:*:*:*:*:*
mitsubishielectric got2000 gt2103-pmbds2 firmwareall versionsnvdUScpe:2.3:o:mitsubishielectric:got2000_gt2103-pmbds2_firmware:*:*:*:*:*:*:*:*
mitsubishielectric got2000 gt2103-pmbls firmwareall versionsnvdUScpe:2.3:o:mitsubishielectric:got2000_gt2103-pmbls_firmware:*:*:*:*:*:*:*:*
mitsubishielectric got2000 gt2104-rtbd firmwareall versionsnvdUScpe:2.3:o:mitsubishielectric:got2000_gt2104-rtbd_firmware:*:*:*:*:*:*:*:*

showing 20 of 63

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-21-320-02Mitsubishi Electric GOT products2021-11-16icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could allow the system 's operations to be adversely affected.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2021-11-23modified 2026-06-17

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Related entries.

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+25171 more

references (11)

External citations — patches, advisories, analysis.

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