Vulnerability Description
An improper access control vulnerability has been reported to affect certain legacy versions of HBS 3. If exploited, this vulnerability allows attackers to compromise the security of the operating system.QNAP have already fixed this vulnerability in the following versions of HBS 3: QTS 4.3.6: HBS 3 v3.0.210507 and later QTS 4.3.4: HBS 3 v3.0.210506 and later QTS 4.3.3: HBS 3 v3.0.210506 and later
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qnap | Hybrid Backup Sync | < 3.0.210507 |
| Qnap | Qts | 4.3.6 |
Related Weaknesses (CWE)
References
- https://www.qnap.com/en/security-advisory/qsa-21-19Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-783/Third Party AdvisoryVDB Entry
- https://www.qnap.com/en/security-advisory/qsa-21-19Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-783/Third Party AdvisoryVDB Entry
FAQ
What is CVE-2021-28809?
CVE-2021-28809 is a vulnerability with a CVSS score of 9.8 (CRITICAL). An improper access control vulnerability has been reported to affect certain legacy versions of HBS 3. If exploited, this vulnerability allows attackers to compromise the security of the operating sys...
How severe is CVE-2021-28809?
CVE-2021-28809 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-28809?
Check the references section above for vendor advisories and patch information. Affected products include: Qnap Hybrid Backup Sync, Qnap Qts.