CVE-2023-40144Network attack vector

Authenticated command execution via user-management input

Published Aug 23, 2023 · Updated Aug 2, 2024

OS command injection in CBC digital video recorder firmware allows remote authenticated users to execute arbitrary commands over the network. The flaw is in the recorder user-management module, but CBC has not published the request parameter or command-construction operation that fails to neutralize input. Low-privilege credentials and network access are required; successful exploitation runs commands on the device or alters its settings.

CVSS severity8.8
High
EPSS probability2.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in CBC digital video recorder firmware allows remote authenticated users to execute arbitrary commands over the network. The flaw is in the recorder user-management module, but CBC has not published the request parameter or command-construction operation that fails to neutralize input. Low-privilege credentials and network access are required; successful exploitation runs commands on the device or alters its settings.

The record

CVE
CVE-2023-40144
Published
Aug 23, 2023
Updated
Aug 2, 2024
Vendor
CBC Co., Ltd.
Product
NR-4M, NR-8M, NR-16M series
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=firmware all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CBC Co., Ltd. · NR-4M, NR-8M, NR-16M seriesversion=firmware all versions
CBC Co., Ltd. · NR4H, NR8H, NR16H seriesversion=firmware all versions
CBC Co., Ltd. · DR-16F, DR-8F, DR-4F, DR-16H, DR-8H, DR-4H, DR-4M41 seriesversion=firmware all versions
CBC Co., Ltd. · NR-4F, NR-8F, NR-16F seriesversion=firmware all versions
CBC Co., Ltd. · DR-16M, DR-8M, DR-4M51 seriesversion=firmware all versions

Published CVSS scores

8.8JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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

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Your stack

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