Security Digest · Vulnerability record · Known exploited
CVE-2022-23227: NUUO NVRmini2 Devices Missing Authentication Vulnerability
Exploited in the wild (CISA KEV). 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 handleimportuser.php authentication.
CISA KEV · added 2024-12-18 CVSS 9.8 Critical EPSS 48.5% · p99
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run NUUO NVRmini2 Devices. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-12-18, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-01-08; treat that as the outer limit, not the target.
- EPSS 48.5%, percentile 99: FIRST’s model estimates a 48.5% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
What it is
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 handleimportuser.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.
CISA’s summary
NUUO NVRmini2 devices contain a missing authentication vulnerability that allows an unauthenticated attacker to upload an encrypted TAR archive, which can be abused to add arbitrary users.
Weakness type: CWE-306.
Product: NUUO NVRmini2 Devices · Assigned by: mitre · Published: 2022-01-14
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2024-12-18; federal due date 2025-01-08. Known ransomware use: Unknown.
- CISA required action: The impacted product is end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue utilization of the product.
- CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 48.50% probability of exploitation activity in the next 30 days; percentile 99.
Timeline
- — CVE record published by mitre
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (nuuo.com) nuuo.com
Vulnerability records
- CVE.org record CVE-2022-23227 cve.org
- NVD entry CVE-2022-23227 nvd.nist.gov
Government
Other references from the CVE record and advisory
- github.com github.com
- github.com github.com
- portswigger.net portswigger.net
- news.ycombinator.com news.ycombinator.com
All exploited NUUO vulnerabilities · Today’s Security Digest