Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated remote attacker run operating-system commands on affected NUUO NVRmini devices. Because these systems often manage surveillance infrastructure, compromise could affect confidentiality, integrity, and availability. CISA lists this CVE in KEV, so treat exposed devices as urgent.
Executive priority
Prioritize immediately if any NUUO NVRmini device is exposed or business-critical. KEV status means known exploitation has occurred, and the technical impact is full device compromise. Unsupported or internet-facing devices should be isolated or replaced quickly.
Technical view
CVE-2018-14933 is a CWE-78 OS command injection in upgrade_handle.php. The uploaddir parameter for a writeuploaddir command can contain shell metacharacters, enabling remote command execution. The CVSS 3.1 score is 9.8 with network access, low complexity, no privileges, and no user interaction required.
Likely exposure
Likely exposure is NUUO NVRmini devices reachable over a network, especially management interfaces exposed to the internet or broad internal networks. The bundle does not provide exact affected versions, CPEs, or a vendor patch statement.
Exploitation context
Active exploitation is supported by CISA KEV listing for CVE-2018-14933. Exploit-DB references also show public exploit material exists. The supplied sources do not describe campaign scope, affected sectors, or whether exploitation remains widespread today.
Researcher notes
The core issue is command injection through shell metacharacters in a request parameter handled by upgrade_handle.php. Sources establish RCE and KEV status, but do not provide exact version boundaries, patch identifiers, or safe detection logic. Avoid assuming all NUUO products are affected.
Mitigation direction
- Identify all NUUO NVRmini devices and their firmware versions.
- Check NUUO or reseller guidance for supported fixes or replacement paths.
- Remove internet exposure for NVRmini management interfaces.
- Restrict access to trusted administrative networks only.
- Retire or replace unsupported devices if no fix is available.
Validation and detection
- Inventory assets for NUUO NVRmini systems.
- Confirm whether upgrade_handle.php exists on reachable devices.
- Review access logs for unusual upgrade_handle.php activity.
- Check for references to writeuploaddir parameter activity.
- Verify management interfaces are not publicly reachable.
- Document firmware status and vendor support status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-14933 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 45070CVE reference · exploit, x_refsource_EXPLOIT-DB
- 46340CVE reference · exploit, x_refsource_EXPLOIT-DB
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-14933CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.