Is CVE-2021-20589 actively exploited?

No active exploitation of CVE-2021-20589 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-20589 be exploited remotely?

Yes. CVE-2021-20589 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-20589?

CVE-2021-20589 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2021-20589

HIGH

CVE-2021-20589

CWE-119Published: May 19, 2021· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-20589 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.