CVE-2025-29659Known exploitationPublic exploitNetwork attack vector

Root command execution via unauthenticated TCP listener

Published Apr 21, 2025 · Updated Apr 21, 2025

Remote command execution in Yi IOT XY-3820 firmware 6.0.24.10 allows remote attackers to run commands as root over TCP port 999. The cmd_listen function accepts text before the $$boundary delimiter as a shell command without authentication or filtering. The cmd binary is absent from the normal boot sequence, so it must already be running or be launched through another flaw before remote exploitation.

CVSS severity9.8
Critical
EPSS probability1.41%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote command execution in Yi IOT XY-3820 firmware 6.0.24.10 allows remote attackers to run commands as root over TCP port 999. The cmd_listen function accepts text before the $$boundary delimiter as a shell command without authentication or filtering. The cmd binary is absent from the normal boot sequence, so it must already be running or be launched through another flaw before remote exploitation.

The record

CVE
CVE-2025-29659
Published
Apr 21, 2025
Updated
Apr 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-285, T1190, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-285Improper Authorization
T1190Exploit Public-Facing Application
T1059.004Unix Shell

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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