CVE-2021-20589

HIGH
7.5
CVSS Score
Published: May 19, 2021 at 10:28 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
13 products affected across 1 vendorGT27 FirmwareGT25 FirmwareGS21 Firmware· also runs on 6 platforms

Using GOT2000 series; GOT SIMPLE series; GT SoftGOT2000; Tension Controller by N/A?

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

Buffer access with incorrect length value vulnerability in GOT2000 series GT27 model communication driver versions 01.19.000 through 01.38.000, GT25 model communication driver versions 01.19.000 through 01.38.000, GT23 model communication driver versions 01.19.000 through 01.38.000 and GT21 model communication driver versions 01.21.000 through 01.39.000, GOT SIMPLE series GS21 model communication driver versions 01.21.000 through 01.39.000, GT SoftGOT2000 versions 1.170C through 1.250L and Tension Controller LE7-40GU-L Screen package data for MODBUS/TCP V1.00 allows a remote unauthenticated attacker to stop the communication function of the products via specially crafted packets.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

01.21.000 ≤ v ≤ 01.39.000
mitsubishi-gs21 (environment)
1.170c ≤ v ≤ 1.250l
mitsubishi-gt-softgot2000 (environment)
01.21.000 ≤ v ≤ 01.39.000
mitsubishi-gt21 (environment)
01.19.000 ≤ v ≤ 01.38.000
mitsubishi-gt23 (environment)
01.19.000 ≤ v ≤ 01.38.000
mitsubishi-gt25 (environment)
01.19.000 ≤ v ≤ 01.38.000
mitsubishi-gt27 (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119

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