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CRITICAL · CVSS 9.8 CISA Known Exploited Vulnerability

CVE-2022-23227

NUUO NVRmini2 Devices Missing Authentication Vulnerability

NUUO NVRmini2 Devices

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.

CVSS
9.8
CRITICAL
EPSS
48.5%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
14 Jan 2022
CWE-306

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 18 December 2024. US federal agencies were required to remediate it by 8 January 2025.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 48.5%, which is higher than 98.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Frequently asked questions

Is CVE-2022-23227 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2022-23227.

What does CVE-2022-23227 affect?

CVE-2022-23227 affects NUUO NVRmini2 Devices. 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.

How severe is CVE-2022-23227?

CVE-2022-23227 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 48.5%, higher than 98.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 8 January 2025.

How should organisations respond to CVE-2022-23227?

Apply the vendor patch for NUUO NVRmini2 Devices as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.