Security readout for executives and security teams
Plain-English summary
This flaw lets an unauthenticated attacker abuse NUUO NVRmini2 user-import functionality to add arbitrary users. When chained with another listed flaw, the sources say it can lead to arbitrary file overwrite under the web root and root-level code execution. CISA KEV marks it as known exploited.
Executive priority
Treat this as urgent for any exposed or mission-relevant video recording systems. Known exploitation and possible root compromise create confidentiality, integrity, and availability risk, including surveillance disruption and foothold creation inside physical-security networks.
Technical view
CVE-2022-23227 is a missing-authentication issue in handle_import_user.php affecting NUUO NVRmini2 through 3.11. The described attack path uses an encrypted TAR user import to add users without authentication, and may be chained with CVE-2011-5325 for web-root file overwrite and root code execution.
Likely exposure
Exposure is most likely where NUUO NVRmini2 devices through version 3.11 are deployed, especially if administration or web interfaces are reachable from untrusted networks. The source bundle does not provide CPEs, fleet prevalence, or a named fixed version.
Exploitation context
Active exploitation is supported by the CISA Known Exploited Vulnerabilities listing. The bundle also cites a public researcher advisory and Metasploit pull request, but it does not provide campaign details, exploitation volume, or affected organizations.
Researcher notes
The key issue is CWE-306: missing authentication on the user import endpoint. The source bundle supports a chain with CVE-2011-5325, but does not name a fixed release or vendor mitigation. Avoid assuming broader NUUO product impact without additional evidence.
Mitigation direction
- Identify any NUUO NVRmini2 devices and firmware versions in service.
- Check NUUO guidance for patched firmware or replacement options.
- Remove affected NVR interfaces from direct internet exposure.
- Restrict access to trusted management networks or VPN paths only.
- Review device accounts for unauthorized users or privilege changes.
Validation and detection
- Confirm whether any NUUO NVRmini2 devices run version 3.11 or earlier.
- Check whether web or management interfaces are reachable externally.
- Audit user lists for unexpected administrative or service accounts.
- Review web-root integrity for unexpected files or recent changes.
- Check logs for suspicious import, login, or configuration activity.
Public sources used
Michael Williams reviewed this cited source version on .
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-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-23227 mapping review
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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
- https://github.com/pedrib/PoC/blob/master/advisories/NUUO/nuuo_nvrmini_round2.mkdCVE reference · x_refsource_MISC
- https://github.com/rapid7/metasploit-framework/pull/16044CVE reference · x_refsource_MISC
- https://portswigger.net/daily-swig/researcher-discloses-alleged-zero-day-vulnerabilities-in-nuuo-nvrmini2-recording-deviceCVE reference · x_refsource_MISC
- https://news.ycombinator.com/item?id=29936569CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-23227CVE 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.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.