Path Traversal in QNAP Qts
CVE-2021-28798
A relative path traversal vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, this vulnerability allows attackers to modify files that impact system integrity. QNAP have already fixed this vulnerability in the following versions: QTS 4.5.2.1630 Build 20210406 and later QTS 4.3.6.1663 Build 20210504 and later QTS 4.3.3.1624 Build 20210416 and later QuTS hero h4.5.2.1638 Build 20210414 and later QNAP NAS running QTS 4.5.3 are not affected.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- QNAP Qts
- QNAP Quts Hero
- QNAP Systems Inc. Qts — versions unspecified, 4.5.3
- QNAP Systems Inc. Quts Hero — versions unspecified
Weakness classification (CWE)
References
- www.qnap.com/zh-tw/security-advisory/qsa-21-14 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-28798?
- CVE-2021-28798 is a high-severity vulnerability in QNAP Qts, classified under Relative Path Traversal. CVSS score: 8.8/10. Published 2021-05-21.
- How severe is CVE-2021-28798?
- High severity. CVSS v3 base score is 8.8 out of 10.