CVE-2018-14933 — Nvrmini Firmware
CRITICALCVE-2018-14933 is a critical-severity (CVSS 9.8) OS Command Injection vulnerability in nuuo nvrmini firmware. It is in CISA's Known Exploited Vulnerabilities catalog (added 2024-12-18) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.
upgrade_handle.php on NUUO NVRmini devices allows Remote Command Execution via shell metacharacters in the uploaddir parameter for a writeuploaddir command.
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2024-12-18. Federal agencies were required to remediate by 2025-01-08.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2018-14933.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2018-14933 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).
Where this sits among everything scored
Of 394,415 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
upgrade_handle.php on NUUO NVRmini devices allows Remote Command Execution via shell metacharacters in the uploaddir parameter for a writeuploaddir command.
Affected Products
nvrmini firmwarenuuoResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
NUUO NVRmini - upgrade_handle.php Remote Command Execution (Metasploit)
by Metasploit · Feb 11, 2019
NUUO NVRmini - 'upgrade_handle.php' Remote Command Execution
by Berk Dusunur · Jul 23, 2018
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every nuuo nvrmini firmware deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2018-14933 yet — track the nuuo nvrmini firmware advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
How to detect CVE-2018-14933
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2018-14933 -u https://target- Template
- NUUO NVRmini - Remote Command Execution
- Severity
- critical
- Impact
- Unauthenticated attackers can execute arbitrary commands on the NUUO NVRmini device by manipulating the uploaddir parameter in upgrade_handle.php, leading to complete device compromise and potential unauthorized access to video surveillance systems and recordings.
- Remediation
- Update NUUO NVRmini to a patched version later than the 2016 firmware that properly validates the uploaddir parameter and restricts command execution.
Template by ProjectDiscovery nuclei-templates (ritikchaddha), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2018-14933 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.