CVE-2025-59452Public exploitNetwork attack vector

MQTT credential disclosure via predictable profile endpoint

Published Oct 6, 2025 · Updated Oct 6, 2025

Predictable identifiers in the YoSmart API through 2025-10-02 allow remote attackers to retrieve YoLink Hub MQTT credentials. The Hub profile endpoint combines a guessable MAC address with an MD5 digest of the device ID and a static non-secret value, then returns broker credentials. No authentication is required; possession or enumeration of a Hub MAC address exposes MQTT credentials that permit message interception, including Wi-Fi credentials, but not device-control publication.

CVSS severity5.8
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable identifiers in the YoSmart API through 2025-10-02 allow remote attackers to retrieve YoLink Hub MQTT credentials. The Hub profile endpoint combines a guessable MAC address with an MD5 digest of the device ID and a static non-secret value, then returns broker credentials. No authentication is required; possession or enumeration of a Hub MAC address exposes MQTT credentials that permit message interception, including Wi-Fi credentials, but not device-control publication.

The record

CVE
CVE-2025-59452
Published
Oct 6, 2025
Updated
Oct 6, 2025
Vendor
YoSmart
Product
YoSmart API
Classifications
CWE-340, T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2025-10-02

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

YoSmart · YoSmart APIversion=0 <=2025-10-02

Published CVSS scores

5.8MITRECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-340Generation of Predictable Numbers or Identifiers
T1552Unsecured Credentials

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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