ACTIVELY EXPLOITED
CVE-2021-28799: QNAP NAS Improper Authorization Vulnerability
| Vendor | QNAP |
|---|---|
| Product | Network Attached Storage (NAS) |
| Actively exploited | Yes |
| Added to CISA KEV | 31 Mar 2022 |
| CISA federal deadline | 21 Apr 2022 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-285 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
QNAP NAS running HBS 3 contains an improper authorization vulnerability which can allow remote attackers to log in to a device.
SOURCES
Other QNAP flaws
- CVE-2023-47565: QNAP VioStor NVR OS Command Injection Vulnerability
- CVE-2022-27593: QNAP Photo Station Externally Controlled Reference Vulnerability
- CVE-2019-7195: QNAP Photo Station Path Traversal Vulnerability
- CVE-2019-7194: QNAP Photo Station Path Traversal Vulnerability
- CVE-2019-7193: QNAP QTS Improper Input Validation Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.