CVE-2025-66357Network attack vector

Availability loss via endless error-file downloads

Published Dec 16, 2025 · Updated Dec 16, 2025

Resource exhaustion in CHOCO TEI WATCHER mini all versions allows remote attackers to disrupt video downloads via network delays. During a video-file download, delayed communication between the web app and appliance causes error-file downloads to repeat indefinitely. The web interface is network-reachable without required privileges or user interaction, and the resulting abnormal resource consumption can interrupt appliance availability.

CVSS severity6.9
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Resource exhaustion in CHOCO TEI WATCHER mini all versions allows remote attackers to disrupt video downloads via network delays. During a video-file download, delayed communication between the web app and appliance causes error-file downloads to repeat indefinitely. The web interface is network-reachable without required privileges or user interaction, and the resulting abnormal resource consumption can interrupt appliance availability.

The record

CVE
CVE-2025-66357
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
Inaba Denki Sangyo Co., Ltd.
Product
CHOCO TEI WATCHER mini
Classifications
CWE-754, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Inaba Denki Sangyo Co., Ltd. · CHOCO TEI WATCHER miniversion=all versions

Published CVSS scores

6.9JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
5.3JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo