CVE-2022-23227
CriticalExploitedPublic exploitNUUO NVRmini2 through 3.11 allows an unauthenticated attacker to upload an encrypted TAR archive, which can be abused to add arbitrary users because of the lack of handle_import_user.php authentication.
Published Jan 14, 2022 · Updated Nov 7, 2025
Key Facts
Patch immediately- CVE-2022-23227 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Nvrmini2 Firmware (Nuuo).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 18, 2024. Public exploit code is available.
- EPSS estimates a 48% probability of exploitation in the next 30 days.
- Fixed versions are available, including Nvrmini2 Firmware <=3.11.0, Nvrmini2 Firmware 3.11.0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
48%
Higher than 98.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2022-23227 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
NUUO NVRmini2 through 3.11 allows an unauthenticated attacker to upload an encrypted TAR archive, which can be abused to add arbitrary users because of the lack of handle_import_user.php authentication. When combined with another flaw (CVE-2011-5325), it is possible to overwrite arbitrary files under the web root and achieve code execution as root.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Dec 18, 2024 | Jan 8, 2025 | Not reported |
| Industry KEV feed | Dec 18, 2024 | Jan 8, 2025 | Not reported |
| CIRCL KEV | Dec 18, 2024 | Jan 8, 2025 | Not reported |
| ENISA EUVD | Dec 18, 2024 | n/a | Not reported |
Required action: The impacted product is end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue utilization of the product.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Nvrmini2 FirmwareNuuo | See advisory | 3.11.0 |
Patched Releases
Nvrmini2 Firmware
<=3.11.0
Timeline
Publicly disclosed
Jan 14, 2022
Added to CISA KEV
Dec 18, 2024
Added to Industry KEV feed
Dec 18, 2024
Added to CIRCL KEV
Dec 18, 2024
Added to ENISA EUVD
Dec 18, 2024
Last updated
Nov 7, 2025
Weakness Type
- CWE-306 Missing Authentication for Critical Function
References
- advisoryhttps://news.ycombinator.com/item?id=29936569
- exploithttps://github.com/pedrib/PoC/blob/master/advisories/NUUO/nuuo_nvrmini_round2.mkd
- exploithttps://github.com/rapid7/metasploit-framework/pull/16044
- exploithttps://portswigger.net/daily-swig/researcher-discloses-alleged-zero-day-vulnerabilities-in-nuuo-nvrmini2-recording-device
- exploitVulnCheck exploitation report
FAQ
Common Questions.
NUUO NVRmini2 through 3.11 allows an unauthenticated attacker to upload an encrypted TAR archive, which can be abused to add arbitrary users because of the lack of handle_import_user.php authentication.
Affected: Nvrmini2 Firmware (Nuuo). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 18, 2024.
Yes. It was added on Dec 18, 2024 with a federal remediation due date of Jan 8, 2025.
Public exploit code is available.
Fixed versions are available, including Nvrmini2 Firmware <=3.11.0, Nvrmini2 Firmware 3.11.0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2022-23227 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo