Is CVE-2021-20592 actively exploited?

No active exploitation of CVE-2021-20592 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-20592 be exploited remotely?

Yes. CVE-2021-20592 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-20592?

CVE-2021-20592 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2021-20592

HIGH

CVE-2021-20592

CWE-662Published: August 5, 2021· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

Missing synchronization vulnerability in GOT2000 series GT27 model communication driver versions 01.19.000 through 01.39.010, GT25 model communication driver versions 01.19.000 through 01.39.010 and GT23 model communication driver versions 01.19.000 through 01.39.010 and GT SoftGOT2000 versions 1.170C through 1.256S allows a remote unauthenticated attacker to cause DoS condition on the MODBUS/TCP slave communication function of the products by rapidly and repeatedly connecting and disconnecting to and from the MODBUS/TCP communication port on a target. Restart or reset is required to recover.

NVD Source

Technical Analysis

CVE-2021-20592 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.