Common Weakness Enumeration

CWE-1242

Allowed

Inclusion of Undocumented Features or Chicken Bits

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The device includes chicken bits or undocumented features that can create entry points for unauthorized actors.

29 vulnerabilities reference this CWE, most recent first.

CVE-2026-82928 (GCVE-0-2026-82928)

Vulnerability from cvelistv5 – Published: 2026-09-28 12:11 – Updated: 2026-09-28 16:32
VLAI
Title
Undocumented access path in mH-DEVELOPER
Summary
mH-DEVELOPER smart home module contains a hardcoded SSH public key in /root/.ssh/authorized_keys, serving as a potential backdoor. The SSH daemon allows root login via key authentication and starts automatically. An attacker with the matching private key can gain a root shell on any affected device, resulting in full system compromise. The key cannot be removed without remounting the file system and survives a factory reset. Vendor notes that this functionality was used only for service purposes. This issue was fixed in version 3.0.30
Severity
7.7 (High)
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 15:49 UTC
CWE
  • CWE-1242 - Inclusion of Undocumented Features or Chicken Bits
Assigner
References
Impacted products
Vendor Product Version
F&F Filipowski mH-DEVELOPER Affected: 0 , < 3.0.30 (semver)
    cpe:2.3:a:f_f_filipowski:mh-developer:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Krzysztof Chudzik (CERT.PL)
Show details on NVD website
To clipboard 

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CVE-2026-24714 (GCVE-0-2026-24714)

Vulnerability from cvelistv5 – Published: 2026-01-30 03:53 – Updated: 2026-01-30 17:59 Unsupported When Assigned
VLAI
Summary
Some end of service NETGEAR products provide "TelnetEnable" functionality, which allows a magic packet to activate telnet service on the box.
Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-30 17:59 UTC
CWE
  • CWE-1242 - Inclusion of undocumented features or chicken bits
Assigner
References
Impacted products
Vendor Product Version
NETGEAR NETGEAR products Affected: versions which provide "TelnetEnable" functionality
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-55050 (GCVE-0-2025-55050)

Vulnerability from cvelistv5 – Published: 2025-09-09 18:56 – Updated: 2025-09-10 14:29
VLAI
Summary
CWE-1242: Inclusion of Undocumented Features
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-10 14:14 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Baicells NOVA430e/430i, NOVA436Q, NEUTRINO430, NOVA846 Affected: BaiBLQ_3.0.12 and older versions. BaiBU_DNB4_2.4.9 and older versions
Create a notification for this product.
Date Public
2025-09-09 18:52
Credits
Shahaf Levi
Show details on NVD website
To clipboard 

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CVE-2025-52548 (GCVE-0-2025-52548)

Vulnerability from cvelistv5 – Published: 2025-09-02 11:26 – Updated: 2025-09-02 13:28
VLAI
Title
Enabling SSH and Shellinabox on the vulnerable machine
Summary
E3 Site Supervisor Control (firmware version < 2.31F01) contains a hidden API call in the application services that enables SSH and Shellinabox, which exist but are disabled by default. An attacker with admin access to the application services can utilize this API to enable remote access to the underlying OS.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-02 13:27 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Copeland LP E3 Supervisory Control Affected: 0 , < 2.31F01 (firmware)
Create a notification for this product.
Date Public
2025-07-29 12:00
Credits
Armis Labs
Show details on NVD website
To clipboard 

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CVE-2025-41756 (GCVE-0-2025-41756)

Vulnerability from cvelistv5 – Published: 2026-03-09 08:16 – Updated: 2026-03-09 20:14
VLAI
Title
Arbitrary Write with ubr-editfile
Summary
A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to write arbitrary files on the system.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-09 20:01 UTC
CWE
  • CWE-1242 - Inclusion of Undocumented Features or Chicken Bits
Assigner
References
Impacted products
Vendor Product Version
MBS UBR-01 Mk II Affected: 0.0.0 , < 6.0.1.0 (semver)
Create a notification for this product.
MBS UBR-02 Affected: 0.0.0 , < 6.0.1.0 (semver)
Create a notification for this product.
MBS UBR-LON Affected: 0.0.0 , < 6.0.1.0 (semver)
Create a notification for this product.
Credits
Adrien Rey from Cyber Defense Campus Zurich Daniel Hulliger from Armasuisse
Show details on NVD website
To clipboard 

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CVE-2025-41754 (GCVE-0-2025-41754)

Vulnerability from cvelistv5 – Published: 2026-03-09 08:15 – Updated: 2026-03-09 20:14
VLAI
Title
Arbitrary Read with ubr-editfile
Summary
A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to read arbitrary files on the system.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-09 20:01 UTC
CWE
  • CWE-1242 - Inclusion of Undocumented Features or Chicken Bits
Assigner
References
Impacted products
Vendor Product Version
MBS UBR-01 Mk II Affected: 0.0.0 , < 6.0.1.0 (semver)
Create a notification for this product.
MBS UBR-02 Affected: 0.0.0 , < 6.0.1.0 (semver)
Create a notification for this product.
MBS UBR-LON Affected: 0.0.0 , < 6.0.1.0 (semver)
Create a notification for this product.
Credits
Adrien Rey from Cyber Defense Campus Zurich Daniel Hulliger from Armasuisse
Show details on NVD website
To clipboard 

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CVE-2025-22450 (GCVE-0-2025-22450)

Vulnerability from cvelistv5 – Published: 2025-01-22 05:49 – Updated: 2025-02-12 20:41
VLAI
Summary
Inclusion of undocumented features issue exists in UD-LT2 firmware Ver.1.00.008_SE and earlier. A remote attacker may disable the LAN-side firewall function of the affected products, and open specific ports.
Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-22 14:33 UTC
CWE
  • CWE-1242 - Inclusion of undocumented features or chicken bits
Assigner
References
Impacted products
Vendor Product Version
I-O DATA DEVICE, INC. UD-LT2 Affected: firmware Ver.1.00.008_SE and earlier
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-12176 (GCVE-0-2025-12176)

Vulnerability from cvelistv5 – Published: 2025-10-24 15:56 – Updated: 2025-10-24 19:56
VLAI
Title
Undocumented Administrative Accounts
Summary
Undocumented administrative accounts were getting created to facilitate access for applications running on board.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.
Severity
10 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-24 16:41 UTC
CWE
  • CWE-1242 - Inclusion of Undocumented Features or Chicken Bits
Assigner
References
Impacted products
Credits
Kevin Schaller Benjamin Lafois Alexi Bitsios Sebastian Toscano Dominik Schneider
Show details on NVD website
To clipboard 

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CVE-2024-54457 (GCVE-0-2024-54457)

Vulnerability from cvelistv5 – Published: 2024-12-18 06:37 – Updated: 2024-12-18 15:28
VLAI
Summary
Inclusion of undocumented features or chicken bits issue exists in AE1021 firmware versions 2.0.10 and earlier and AE1021PE firmware versions 2.0.10 and earlier, which may allow a logged-in user to enable telnet service.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-18 15:25 UTC
CWE
  • CWE-1242 - Inclusion of undocumented features or chicken bits
Assigner
References
Impacted products
Vendor Product Version
FXC Inc. AE1021 Affected: firmware versions 2.0.10 and earlier
Create a notification for this product.
FXC Inc. AE1021PE Affected: firmware versions 2.0.10 and earlier
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2024-52564 (GCVE-0-2024-52564)

Vulnerability from cvelistv5 – Published: 2024-12-05 09:41 – Updated: 2025-01-29 04:55
VLAI
Summary
Inclusion of undocumented features or chicken bits issue exists in UD-LT1 firmware Ver.2.1.8 and earlier and UD-LT1/EX firmware Ver.2.1.8 and earlier. A remote attacker may disable the firewall function of the affected products. As a result, an arbitrary OS command may be executed and/or configuration settings of the device may be altered.
Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-06 00:00 UTC
CWE
  • CWE-1242 - Inclusion of undocumented features or chicken bits
Assigner
References
Impacted products
Vendor Product Version
I-O DATA DEVICE, INC. UD-LT1 Affected: firmware Ver.2.1.8 and earlier
Create a notification for this product.
I-O DATA DEVICE, INC. UD-LT1/EX Affected: firmware Ver.2.1.8 and earlier
Create a notification for this product.
iodata ud-lt1_firmware Affected: 0 , ≤ 2.1.8 (custom)
    cpe:2.3:o:iodata:ud-lt1_firmware:*:*:*:*:*:*:*:*
Create a notification for this product.
iodata ud-lt1\/ex_firmware Affected: 0 , ≤ 2.1.8 (custom)
    cpe:2.3:o:iodata:ud-lt1\/ex_firmware:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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Mitigation
Architecture and Design Implementation

The implementation of chicken bits in a released product is highly discouraged. If implemented at all, ensure that they are disabled in production devices. All interfaces to a device should be documented.

CAPEC-212: Functionality Misuse

An adversary leverages a legitimate capability of an application in such a way as to achieve a negative technical impact. The system functionality is not altered or modified but used in a way that was not intended. This is often accomplished through the overuse of a specific functionality or by leveraging functionality with design flaws that enables the adversary to gain access to unauthorized, sensitive data.

CAPEC-36: Using Unpublished Interfaces or Functionality

An adversary searches for and invokes interfaces or functionality that the target system designers did not intend to be publicly available. If interfaces fail to authenticate requests, the attacker may be able to invoke functionality they are not authorized for.

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