Home / Vulnerabilities / CVE-2021-28799
CRITICAL SEVERITY Ransomware Linked
CVE-2021-28799 QNAP · Network Attached Storage (NAS)

QNAP NAS Improper Authorization Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

CRITICAL
10 / 10
Minimal Risk Critical
Vector Specification
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploitation Likelihood

EPSS Prediction

91.15 %
Predictive Probability
Percentile Rank
99.6 th

Documented as more likely to be exploited than 99.6% of known CVEs.

Detection Date

Mar 31, 2022

Remediation Due

Apr 21, 2022

CISA Catalog Active

Threat Analysis

QNAP NAS running HBS 3 contains an improper authorization vulnerability which can allow remote attackers to log in to a device.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2021-28799