CVE-2025-29660: A vulnerability exists in the daemon process of the Yi IOT XY-3820 v6.0.24.10, which exposes a TCP service on

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CRITICAL 9.8REMOTEMITIGATE

CVE-2025-29660 is a critical-severity flaw (CVSS 9.8) affecting xy-3820 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability exists in the daemon process of the Yi IOT XY-3820 v6.0.24.10, which exposes a TCP service on port 6789. This service lacks proper input validation, allowing attackers to execute arbitrary scripts present on the device by sending specially crafted TCP requests using directory traversal techniques.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 31%)
CISA exploited list	No
Weakness	CWE-22
Published	2025-04-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: yiiot

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-21 15:16 UTCPublished CVE record published
2026-06-17 09:05 UTCUpdated Record last modified

yiiot xy-3820 firmware MITIGATE

Affected: 6.0.24.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0.24.10

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-29660?

xy-3820 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-29660 being exploited?

CVE-2025-29660 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-29660 affect?

CVE-2025-29660 affects xy-3820 firmware. Severity is critical (CVSS 9.8). A vulnerability exists in the daemon process of the Yi IOT XY-3820 v6.0.24.10, which exposes a TCP service on port 6789. This service lacks proper input validation, allowing attackers to execute arbitrary scripts present on the device by se

How urgent is CVE-2025-29660?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-29659 CRITICAL 9.8 MITIGATE Yi IOT XY-3820 6.0.24.10 is vulnerable to Remote Command Execution via the "cmd_listen" function located in th

References

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