CVE-2021-28799
CISA KEVPublished March 31, 2022 · Updated April 3, 2026
high
Official Description+
QNAP NAS running HBS 3 contains an improper authorization vulnerability which can allow remote attackers to log in to a device.
Affected Products
| Vendor | Product |
|---|---|
| QNAP | Network Attached Storage (NAS) |
Patch Status
Patch by 2022-04-21
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2021-28799.