Home/CVE/A relative path traversal vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, th
CVE

CVE-2021-28798

A relative path traversal vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, th

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.

HIGH · CVSS 8.8 EPSS 0.00399
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-23Relative Path Traversal
CWE-284Improper Access Control
▤

Affected Products & Versions

4
qnap qts>= 4.3.2.0144 and < 4.3.3.1624
qnap qts>= 4.3.4.0000 and < 4.3.6.1663
qnap qts>= 4.4.0000 and < 4.5.2.1630
qnap quts hero< h4.5.2.1638
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · security@qnapsecurity.com.tw
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 May 2021 · 03:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.qnap.com/zh-tw/security-advisory/qsa-21-14Vendor Advisory
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