Critical severity9.8NVD Advisory· Published Jul 8, 2021· Updated Jun 17, 2026
CVE-2021-28809
CVE-2021-28809
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
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- QNAP Systems Inc./HBS 3v5Range: unspecified
Patches
Vulnerability mechanics
References
2- www.qnap.com/en/security-advisory/qsa-21-19nvdVendor Advisory
- www.zerodayinitiative.com/advisories/ZDI-21-783/nvdThird Party AdvisoryVDB Entry
News mentions
0No linked articles in our index yet.