CVE-2021-28816
Last modified
CVE-2021-28816 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A stack buffer overflow vulnerability has been reported to affect QNAP device running QTS, QuTScloud, QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary code. EPSS estimates a 0.90% chance of exploitation in the next 30 days.
Description
A stack buffer overflow vulnerability has been reported to affect QNAP device running QTS, QuTScloud, QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of QTS, QuTScloud, QuTS hero: QTS 4.5.4.1715 build 20210630 and later QTS 5.0.0.1716 build 20210701 and later QTS 4.3.3.1693 build 20210624 and later QTS 4.3.6.1750 build 20210730 and later QuTScloud c4.5.6.1755 and later QuTS hero h4.5.4.1771 build 20210825 and later
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Qnap | Qts | < 4.3.3.1693 |
| Qnap | Qts | >= 4.3.4, < 4.3.6.1750 |
| Qnap | Qts | >= 4.4.0, < 4.5.4.1715 |
| Qnap | Qts | >= 5.0.0, < 5.0.0.1716 |
| Qnap | Quts Hero | < h4.5.4.1771 |
| Qnap | Qutscloud | < c4.5.6.1755 |
References
- https://www.qnap.com/en/security-advisory/qsa-21-33Vendor Advisory
- https://www.qnap.com/en/security-advisory/qsa-21-33Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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