Cyber Resilience

CVE-2018-14933

RCE in Nuuo Nvrmini Firmware 2016

CISA KEVActive ExploitationEUVD ExploitedPublic PoCRCECommand Injection
Published
04 August 2018
Modified
07 November 2025
KEV Added
18 December 2024
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.95 99.9th percentile
Risk Priority 97 floored blend · peak EPSS

Summary

CVE-2018-14933 is a critical-severity OS Command Injection (CWE-78) vulnerability in Nuuo Nvrmini Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 0.1% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2018-14933 is an OS command injection vulnerability (CWE-78) affecting the upgrade_handle.php script on NUUO NVRmini devices. Untrusted input to the uploaddir parameter during a writeuploaddir command is passed directly to a shell without sanitization, enabling arbitrary command execution.

Unauthenticated remote attackers can exploit the flaw over the network by supplying shell metacharacters in the uploaddir parameter. Successful exploitation grants full control of the affected device, allowing arbitrary code execution with impacts to confidentiality, integrity, and availability.

Public exploits for the issue have been available on Exploit-DB since 2018, and the vulnerability is listed in the CISA Known Exploited Vulnerabilities catalog, confirming observed in-the-wild exploitation. No vendor patch or mitigation details are provided in the referenced sources.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

upgrade_handle.php on NUUO NVRmini devices allows Remote Command Execution via shell metacharacters in the uploaddir parameter for a writeuploaddir command.

CWE(s)
CWE-78
KEV Date Added
18 December 2024

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-39780Shared CWE-78both on KEV
CVE-2021-20035Shared CWE-78both on KEV
CVE-2026-39808Shared CWE-78both on KEV
CVE-2023-49897Shared CWE-78both on KEV
CVE-2024-6047Shared CWE-78both on KEV
CVE-2024-40890Shared CWE-78both on KEV
CVE-2025-48703Shared CWE-78both on KEV
CVE-2024-9463Shared CWE-78both on KEV
CVE-2019-17621Shared CWE-78both on KEV
CVE-2024-1212Shared CWE-78both on KEV

Affected Assets

nuuo
nvrmini firmware
2016

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8
  • V15.2.5

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References