CVE-2018-14933
upgrade_handle.php on NUUO NVRmini devices allows Remote Command Execution via shell metacharacters in the uploaddir parameter for a writeuploaddir command.
do firstThe impacted product is end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue utilization of the product.
Can a WAF block it? Partly. The attack uses shell metacharacters in an HTTP parameter, which is unusual and can be detected by a WAF rule matching such characters in that specific parameter. A WAF rule can match shell metacharacters in the uploaddir parameter of upgrade_handle.php. No tracked WAF vendor has published a rule for this CVE yet, so you would write it yourself.
What a custom rule would match: shell metacharacters in the uploaddir parameter of upgrade_handle.php
Also consider: patch · custom WAF rule · shlex/execve-style APIs
Based on an AI reading of the CVE description, and no vendor rule found yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Is CVE-2018-14933 being exploited?
Yes. CVE-2018-14933 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2018-14933?
CVE-2018-14933 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2018-14933?
Not known from our data. No patch reference has been recorded for CVE-2018-14933, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2018-14933 affect?
CVE-2018-14933 affects nuuo:nvrmini_firmware. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
public exploits
Public exploit code: 2 on Exploit-DB · 1 Metasploit module · 1 Nuclei template
- NUUO NVRmini - upgrade_handle.php Remote Command Execution (Metasploit) · remote · 11 Feb 2019 · verified
- NUUO NVRmini - upgrade_handle.php Remote Command Execution (Metasploit) · remote · 11 Feb 2019 · verified
- exploit/multi/http/nuuo_nvrmini_upgrade_rce · exploit · excellent
- NUUO NVRmini - Remote Command Execution · detection template · critical
Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.
cisa ssvc
- exploitation
- active
- automatable
- yes
- technical impact
- total
Assessed by CISA 21 Dec 2024 (SSVC 2.0.3).
timeline
- 4 Aug 2018Published
- 11 Feb 2019First public exploit or proof of concept · 190 days (about 6 months) later
- 18 Dec 2024Added to CISA KEV (exploited in the wild) · 2,137 days (about 6 years) later
- 21 Dec 2024CISA SSVC assessment: exploitation active · 3 days later
- 8 Jan 2025CISA remediation due date (US federal agencies) · 18 days later
- 21 Oct 2025CVE record last updated · 287 days (about 10 months) later
- 2 Nov 2026Analysed by vulneraibility.com · 377 days (about 1 year) later
- Exploitexploit-db.com /exploits/45070/
- Exploitexploit-db.com /exploits/46340/
- Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-14933
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA KEV catalog: exploitation, date added, due date
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Exploit-DB: published exploits
- Metasploit Framework: exploit and scanner modules
- Nuclei templates: detection templates
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.