High severity · published May 21, 2021
CVE-2021-28798
A relative path traversal vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero
7.5
CVSS
0.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QT
Qts · Qnap
4.3.2.0144 before 4.3.3.1624; 4.3.4.0000 before 4.3.6.1663; 4.4.0000 before 4.5.2.1630 · source: NVD
QH
Quts Hero · Qnap
before h4.5.2.1638 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28798
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28798
Vendor Advisory
https://www.qnap.com/zh-tw/security-advisory/qsa-21-14
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