Auth bypass in QNAP Qts
CVE-2024-21899
An improper authentication vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to compromise the security of the system via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.3.2578 build 20231110 and later QTS 4.5.4.2627 build 20231225 and later QuTS hero h5.1.3.2578 build 20231110 and later QuTS hero h4.5.4.2626 build 20231225 and later QuTScloud c5.1.5.2651 and later
Vulnerability class: Broken Authentication
EPSS: 0.244 (97.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Qnap Qts — versions 4.5.4.2627, 5.1.3.2578
- Qnap Qutscloud
- Qnap Quts_hero — versions h4.5.4.2626, h5.1.3.2578
- Qnap Systems Inc. Qts — versions 5.1.x, 4.5.x
- Qnap Systems Inc. Qutscloud — versions c5.x.x
- Qnap Systems Inc. Quts Hero — versions h5.1.x, h4.5.x
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@qnapsecurity.com.tw (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-21899?
- CVE-2024-21899 is a critical-severity vulnerability in QNAP Qts, classified under Improper Authentication. CVSS score: 9.8/10. Published 2024-03-08.
- How severe is CVE-2024-21899?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2024-21899 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.