TI-2021-09790 Aliases CVE-2021-28798 GHSA-hc4v-wrjp-6qpg

Relative Path Traversal Vulnerability in QTS and QuTS hero

MEDIUM 40CWE-23Published 2021-05-21 · Updated 2024-09-16

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

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.

Why it matters now

EPSS 0.00938 61st percentileScored 2026-11-07

Fix Fixed QTS (QNAP Systems Inc.): 4.5.2.1630 Build 20210406, 4.3.6.1663 Build 20210504, 4.3.3.1624 Build 20210416 +1QuTS hero (QNAP Systems Inc.): h4.5.2.1638 Build 20210414

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
QNAP	QTS	before 4.5.2.1630 Build 20210406; before 4.3.6.1663 Build 20210504; before 4.3.3.1624 Build 20210416	4.5.2.1630 Build 20210406, 4.3.6.1663 Build 20210504, 4.3.3.1624 Build 20210416, 4.5.3	Patch available	CNA
QNAP	QuTS hero	before h4.5.2.1638 Build 20210414	h4.5.2.1638 Build 20210414	Patch available	CNA

QTS VendorQNAP Affected before 4.5.2.1630 Build 20210406; before 4.3.6.1663 Build 20210504; before 4.3.3.1624 Build 20210416 Fixed in 4.5.2.1630 Build 20210406, 4.3.6.1663 Build 20210504, 4.3.3.1624 Build 20210416, 4.5.3 Patch available CNA
QuTS hero VendorQNAP Affected before h4.5.2.1638 Build 20210414 Fixed in h4.5.2.1638 Build 20210414 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:qnap:qts::::::::	4.3.2.0144 to before 4.3.3.1624; 4.3.4.0000 to before 4.3.6.1663; 4.4.0000 to before 4.5.2.1630	Vulnerable	QNAP
cpe:2.3:o:qnap:quts_hero::::::::	before h4.5.2.1638	Vulnerable	QNAP

cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:* Versions 4.3.2.0144 to before 4.3.3.1624; 4.3.4.0000 to before 4.3.6.1663; 4.4.0000 to before 4.5.2.1630 Vulnerable ·QNAP
cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:* Versions before h4.5.2.1638 Vulnerable ·QNAP

Remediation

Fix · CNA QTS (QNAP Systems Inc.) Fixed in 4.5.2.1630 Build 20210406, 4.3.6.1663 Build 20210504, 4.3.3.1624 Build 20210416, 4.5.3
Fix · CNA QuTS hero (QNAP Systems Inc.) Fixed in h4.5.2.1638 Build 20210414

Timeline

2026-10-02 Threatist record created from CVE-2021-28798
2026-10-03 Alias added: GHSA-hc4v-wrjp-6qpg

References

Advisory 1

https://www.qnap.com/zh-tw/security-advisory/qsa-21-14

TI-2020-02221 Command Injection Vulnerability in QTS and QuTS hero KEVCVSS 3.1CRITICAL 9.8
TI-2019-05101 Improper input validation in QNAP NAS devices KEVCVSS 3.1CRITICAL 9.8
TI-2018-14137 Improper input validation in QNAP QTS KEVCVSS 3.1CRITICAL 9.8
TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
TI-2018-14131 Cross-site scripting in QNAP QTS KEVCVSS 3.1HIGH 8.0

See all 282 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences