Inaba Denki Sangyo CHOCO TEI WATCHER Mini
1. EXECUTIVE SUMMARY
- CVSS v4 9.3
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Inaba Denki Sangyo Co., Ltd.
- Equipment: CHOCO TEI WATCHER mini
- Vulnerabilities: Use of Client-Side Authentication, Storing Passwords in a Recoverable Format, Weak Password Requirements, Direct Request ('Forced Browsing')
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to obtain the product's login password, gain unauthorized access, tamper with product's data, and/or modify product settings.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of CHOCO TEI WATCHER are affected:
- CHOCO TEI WATCHER mini (IB-MCT001): All versions
3.2 VULNERABILITY OVERVIEW
3.2.1 USE OF CLIENT-SIDE AUTHENTICATION CWE-603
The affected product is vulnerable to a use of client-side authentication vulnerability, which may allow an attacker to obtain the product's login password without authentication.
CVE-2025-24517 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
A CVSS v4 score has also been calculated for CVE-2025-24517. A base score of 8.7 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N).
3.2.2 STORING PASSWORDS IN A RECOVERABLE FORMAT CWE-257
An attacker who can access the microSD card used on the product may obtain the product's login password.
CVE-2025-24852 has been assigned to this vulnerability. A CVSS v3.1 base score of 4.6 has been calculated; the CVSS vector string is (AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
A CVSS v4 score has also been calculated for CVE-2025-24852. A base score of 5.1 has been calculated; the CVSS vector string is (AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N).
3.2.3 WEAK PASSWORD REQUIREMENTS CWE-521
The affected product is vulnerable to a weak password requirement vulnerability, which may allow an attacker to execute a brute-force attack resulting in unauthorized access and login.
CVE-2025-25211 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
A CVSS v4 score has also been calculated for CVE-2025-25211. A base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.2.4 DIRECT REQUEST ('FORCED BROWSING') CWE-425
If a remote attacker sends a specially crafted HTTP request to the product, the product's data may be obtained or deleted, and/or the product's settings may be altered.
CVE-2025-26689 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
A CVSS v4 score has also been calculated for CVE-2025-26689. A base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Japan
3.4 RESEARCHER
Andrea Palanca of Nozomi Networks reported these vulnerabilities to Inaba Denki Sangyo Co., Ltd. and CISA.
JPCERT/CC coordinated with Andrea Palanca, CISA ICS, and Inaba Denki Sangyo Co., Ltd.
4. MITIGATIONS
Inaba Denki Sangyo Co., Ltd. recommends users follow the following workarounds to help mitigate the impacts of these vulnerabilities:
- Use the product within LAN and block access from untrusted networks and hosts through firewalls.
- Use a firewall or virtual private network (VPN), etc. to prevent unauthorized access when Internet access is required, and restrict Internet access to minimum.
- Restrict the product operation (including use/handling of microSD cards on the product) only to authorized users.
For more information see the associated security advisory JVNVU#91154745 and Multiple vulnerabilities in CHOCO TEI WATCHER mini.
CISA recommends users take defensive measures to minimize the risk of exploitation.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
- Do not click web links or open attachments in unsolicited email messages.
- Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
- Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.
5. UPDATE HISTORY
- March 25, 2025: Initial Publication
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